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Just Checking
The water has been in for abot 3 weeks.
The Live Rock and Arag-alive sand have been in the tank for 10 days. The ammonia has been steady at .25 for 3 days The Nitrite at .2 for 3 days. There are Hundreds of Pods scooting around. About a dozen teeny-tiny snails on the glass. About a half dozen M+M size filter feeders have shown their crowns. (Apastasia?). I`m just checking----does this sound about normal for my tank`s stage of the game? thanks as always |
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"StringerBell" wrote in message ... The water has been in for abot 3 weeks. The Live Rock and Arag-alive sand have been in the tank for 10 days. The ammonia has been steady at .25 for 3 days The Nitrite at .2 for 3 days. There are Hundreds of Pods scooting around. About a dozen teeny-tiny snails on the glass. About a half dozen M+M size filter feeders have shown their crowns. (Apastasia?). I`m just checking----does this sound about normal for my tank`s stage of the game? Sounds fine. It appears that your ammonia levels are no longer rising because it is being metabolised into nitrite and your nitrite into nitrate. This might be a good time to check your nitrate levels. Your cycle could last as long as long as 30 days before ammonia levels start to really fall. Every tank is different so there is no way to say exactly how long it will take. Relax and have a beer. thanks as always |
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"b o o g e r" .@. wrote in message m... Every tank is different so there is no way to say exactly how long it will take. Relax and have a beer. Sounds good---I think I`ll make it a nice Leffe Blonde----or maybe a Chimay. I wish I could buy you all a nice frosty one (or better yet, a slightly warmer Belgian Ale) for holding my cyber hand through this project. Cheers Y`all |
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Sounds good---I think I`ll make it a nice Leffe Blonde----or maybe a
Chimay. I wish I could buy you all a nice frosty one (or better yet, a slightly warmer Belgian Ale) for holding my cyber hand through this project. Cheers Y`all Good luck. :) |
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Don't you mean "metabolized"
Nice booger. If your going to call people on grammar and English YALL BETTER BE ON YOUR BEST BEHAVIOR ! "b o o g e r" .@. wrote in message m... "StringerBell" wrote in message ... The water has been in for abot 3 weeks. The Live Rock and Arag-alive sand have been in the tank for 10 days. The ammonia has been steady at .25 for 3 days The Nitrite at .2 for 3 days. There are Hundreds of Pods scooting around. About a dozen teeny-tiny snails on the glass. About a half dozen M+M size filter feeders have shown their crowns. (Apastasia?). I`m just checking----does this sound about normal for my tank`s stage of the game? Sounds fine. It appears that your ammonia levels are no longer rising because it is being metabolised into nitrite and your nitrite into nitrate. This might be a good time to check your nitrate levels. Your cycle could last as long as long as 30 days before ammonia levels start to really fall. Every tank is different so there is no way to say exactly how long it will take. Relax and have a beer. thanks as always |
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"TheRock" wrote in message news:M8%Rg.594$Dq3.178@trndny06... Don't you mean "metabolized" Nice booger. If your going to call people on grammar and English YALL BETTER BE ON YOUR BEST BEHAVIOR ! That's a little picky eh rocky? Considering all the garbage you just spewed? |
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Picky with you Booger old pal ???
Consider me an equal opportunity ball buster. I'm watching you boog. "b o o g e r" .@. wrote in message m... "TheRock" wrote in message news:M8%Rg.594$Dq3.178@trndny06... Don't you mean "metabolized" Nice booger. If your going to call people on grammar and English YALL BETTER BE ON YOUR BEST BEHAVIOR ! That's a little picky eh rocky? Considering all the garbage you just spewed? |
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"TheRock" wrote in message news:Br%Rg.4084$Zj4.1425@trndny04... Picky with you Booger old pal ??? Consider me an equal opportunity ball buster. I'm watching you boog. It's ball-buster OR ballbuster Rock! Not ball buster. Got ya! http://www.webster.com/cgi-bin/dictionary?va=ballbuster http://dictionary.reference.com/browse/ball-buster I'm glad to see you're catching on and realized that I'm the one to watch. You might just LEARN something. |
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"b o o g e r" .@. wrote in message m...
Sounds fine. It appears that your ammonia levels are no longer rising because it is being metabolised into nitrite and your nitrite into nitrate. This might be a good time to check your nitrate levels. Eh, booger - you do not know enough to be my teacher! This is bad advice... no point of measuring nitrates with aquarium kits, yet! They all work reducing nitrates to nitrites first, and then showing the level of nitrites... So if in your test sample are any detectable nitrites than your nitrates test will be way skewed towards too-high nitrates. Wait for all nitrites to be gone and than you can conclude that your tank finished the cycle. |
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For those of us that care...once again, you are the expert here on balls.
Congratulations booger ignore booger filter on bye bye "b o o g e r" .@. wrote in message ... "TheRock" wrote in message news:Br%Rg.4084$Zj4.1425@trndny04... Picky with you Booger old pal ??? Consider me an equal opportunity ball buster. I'm watching you boog. It's ball-buster OR ballbuster Rock! Not ball buster. Got ya! http://www.webster.com/cgi-bin/dictionary?va=ballbuster http://dictionary.reference.com/browse/ball-buster I'm glad to see you're catching on and realized that I'm the one to watch. You might just LEARN something. |
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"TheRock" wrote in message news:n10Sg.4338$8j4.1677@trndny05... For those of us that care...once again, you are the expert here on balls. Congratulations booger ignore booger filter on It is amazing that you are able to type as good as you do with only one hand. You are a funny one. bye bye Did your filter work Rocko? |
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No, it does not work this way... sorry.
Try harder next time, little ant. Sure it does Pzemol. His nitrite is only 0.25 ppm. Nitrate test kits can read as high as 160 ppm. That should be enough range to cover his nitrate + nitrite levels. Why do you think it wouldn't work Pzemol? |
Just Checking
"b0Oger" wrote in message m...
No, it does not work this way... sorry. Try harder next time, little ant. Sure it does Pzemol. His nitrite is only 0.25 ppm. Nitrate test kits can read as high as 160 ppm. That should be enough range to cover his nitrate + nitrite levels. Why do you think it wouldn't work Pzemol? Because you want to compare apples and oranges! What do you want to subtract ? When you have 5 apples and substract from this 3 oranges, what will you get, Booger? You cannot substract nitrites from nitrates! This is the first grade level of the grammar school, booger! |
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What do you want to subtract ? When you have 5 apples
and substract from this 3 oranges, what will you get, Booger? You cannot substract nitrites from nitrates! This is the first grade level of the grammar school, booger! Pszemol, I am going to try and explain this in more detail. (A) The nitrate test kit reduces nitrate to nitrite and then gives you a measurement of the total nitrite concentration. This is an indirect method for measuring the total nitrate concentration (assuming no nitrite is present to begin with). (B) You can measure the total nitrite concentration in the presence of nitrate by using a nitrite test kit. If I have a glass of water with Xppm nitrite and Yppm nitrate and measure the nitrate levels (involves the reduction of nitrate to nitrite) using a LFS test kit, I will have a measurement of BOTH nitrate and nitrite levels (Xppm + Yppm). Nitrite (Xppm) + Nitrate (Yppm) ----test kit reduction---- Nitrite (Xppm) + Nitrite(Yppm) Nitrite(Xppm) + Nitrite(Yppm) = concentration of nitrite present originally + nitrate present originally. Now if I measure nitrite levels using a nitrite test kit, I can obtain the concentration of nitrite independent of nitrate levels. Measured nitrite levels = Zppm Nitrate concentration = (Xppm + Yppm) - Zppm Is this clear? |
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Nitrate concentration = (Xppm + Yppm) - Zppm
This may or may not confuse the matter for you Pzemol, but in my explanation provided in the previous message, Z = X. Is this clear? |
Just Checking
"bO0ger" wrote in message ...
Measured nitrite levels = Zppm Nitrate concentration = (Xppm + Yppm) - Zppm Is this clear? Not really, it is not clear. I have questions: Do you always know what method of measuring nitrates is used and how is the test color scale calibrated ? If you read from the scale 10mg/l - is it 10mg of N, which equals to 45mg/l NO3- or it is really 10mg/l of NO3- ? Please explain what percentage of nitrates get reduced to nitrites during the duration of test... And why it is not 100% ? Estimate this amount for 5 most popular brands of test. Also, explain how sensitive is the nitrates test for detecting nitrites - will you see reading equal to 10mg/l of NO3- when the sample contains 5mg/l of NO2- and 5mg/l of NO3- or you will get something else as a reading? |
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Do you always know what method of measuring nitrates
is used LFS purchased test kits involve the reduction of NO3- into NO2- and how is the test color scale calibrated ? How is this relevant? If you read from the scale 10mg/l - is it 10mg of N, which equals to 45mg/l NO3- or it is really 10mg/l of NO3- ? How is this relevant? Please explain what percentage of nitrates get reduced to nitrites during the duration of test... And why it is not 100% ? greater than 95% reduction. Estimate this amount for 5 most popular brands of test. How is this relevant? Also, explain how sensitive is the nitrates test for detecting nitrites Sensitive enough for our purposes. - will you see reading equal to 10mg/l of NO3- when the sample contains 5mg/l of NO2- and 5mg/l of NO3- or you will get something else as a reading? It will read close enough to 10 mg/L for our purposes. |
Just Checking
"boooger" wrote in message ...
Do you always know what method of measuring nitrates is used LFS purchased test kits involve the reduction of NO3- into NO2- But what method ? Is each test on the market equally effective in amounts of reduced nitrates ? Please explain what percentage of nitrates get reduced to nitrites during the duration of test... And why it is not 100% ? greater than 95% reduction. Can you provide source for this statement ? Estimate this amount for 5 most popular brands of test. How is this relevant? I doubt the majority of nitrates gets reduced. Also, explain how sensitive is the nitrates test for detecting nitrites Sensitive enough for our purposes. Your believe or is this a reliable information ? - will you see reading equal to 10mg/l of NO3- when the sample contains 5mg/l of NO2- and 5mg/l of NO3- or you will get something else as a reading? It will read close enough to 10 mg/L for our purposes. You believe in this very strongly, right ? :-) For your simple subtraction method you need to assume that close to 100% of nitrates gets reduced to nitrites and than test is measuring nitrites. What if the test is designed to reduce only 50% nitrates in a given time (roughly) and than color scale is calibrated to proper, extrapolated value? Than your math will not work. I need a proof which shows the basic assumption is true. Show me proof for more than 95% of nitrates being reduced in aquarium grade test kits available in aquarium stores. Note - we do not use cooper-cadmium reducing towers... We just dump a little cadmium dust in the vial and shake the vial. Who knows how much nitrates gets reduced! My Aquarium Pharmaceuticals test is bright yellow when there are no nitrates, and goes through orange to dark red-orange at high nitrates. Reading done at the time given in the user manual (5 minutes) differs from the reading done after 1/2 hour... Based on this observation I conclude that during standard 5 minutes time not all nitrates get reduced and you cannot simply subtract one value from another or not ? Similar situation might be with other tests - that is why manufacturer is stating that reading should be done at the certain time, not sooner, not later because this is how the color scale got calibrated. |
Just Checking
For your simple subtraction method you need to assume that close to 100% of nitrates gets reduced to nitrites and than test is measuring nitrites. What if the test is designed to reduce only 50% nitrates in a given time (roughly) and than color scale is calibrated to proper, extrapolated value? Than your math will not work. In your hypothetical example if the test kit only reduces 50% of the nitrate than the math still works. Assume I have 30 ppm nitrate and 10 ppm nitrite and the test kit reduces 50% of the nitrate. Now I will have 15 ppm + 10 ppm nitrite. The test kit will give a value of 35 ppm nitrate (15 ppm + 2*10 ppm). Now measure nitrite and multiply by a factor of 2 and you get 20 ppm nitrite. (15 ppm +2*10 ppm) - 20 ppm = 15 ppm nitrate. Get it? I need a proof which shows the basic assumption is true. Show me proof for more than 95% of nitrates being reduced in aquarium grade test kits available in aquarium stores. Show me proof that it doesn't. Note - we do not use cooper-cadmium reducing towers... We just dump a little cadmium dust in the vial and shake the vial. Who knows how much nitrates gets reduced! I am referring to STORE bought test kits. None that I have seen use cadmium dust. My Aquarium Pharmaceuticals test is bright yellow when there are no nitrates, and goes through orange to dark red-orange at high nitrates. Reading done at the time given in the user manual (5 minutes) differs from the reading done after 1/2 hour... Based on this observation I conclude that during standard 5 minutes time not all nitrates get reduced and you cannot simply subtract one value from another or not Similar situation might be with other tests - that is why manufacturer is stating that reading should be done at the certain time, not sooner, not later because this is how the color scale got calibrated. |
Just Checking
"boooger" wrote in message m...
In your hypothetical example if the test kit only reduces 50% of the nitrate than the math still works. Only if you KNOW it is 50%. But you dont know that! It is not given on the carton box with the test... It is not published on the manufacturer website. How will you know ? Will you calibrate yourself ? Assume I have 30 ppm nitrate and 10 ppm nitrite and the test kit reduces 50% of the nitrate. Now I will have 15 ppm + 10 ppm nitrite. The test kit will give a value of 35 ppm nitrate (15 ppm + 2*10 ppm). Now measure nitrite and multiply by a factor of 2 and you get 20 ppm nitrite. (15 ppm +2*10 ppm) - 20 ppm = 15 ppm nitrate. Get it? Where do you get the factor of 2 ? Why not factor of 3 or 5 ? Get it ? I need a proof which shows the basic assumption is true. Show me proof for more than 95% of nitrates being reduced in aquarium grade test kits available in aquarium stores. Show me proof that it doesn't. Your claim is that you can do simple math to get nitrates using aquarium tests, even while nitrites are present... Your simple math works only when you set asumption, but you cannot prove your assumption to be true. This does not hold! Note - we do not use cooper-cadmium reducing towers... We just dump a little cadmium dust in the vial and shake the vial. Who knows how much nitrates gets reduced! I am referring to STORE bought test kits. None that I have seen use cadmium dust. What do you think they use ? Yes, they do use unoxidated metal - cadmium or zinc - usually delivered in suspension... That is why you are asked to shake the bottle # 2 for 30 seconds (to lift cadmium dust from the bottom of the bottle) before you use it. My Aquarium Pharmaceuticals test is bright yellow when there are no nitrates, and goes through orange to dark red-orange at high nitrates. Reading done at the time given in the user manual (5 minutes) differs from the reading done after 1/2 hour... Based on this observation I conclude that during standard 5 minutes time not all nitrates get reduced and you cannot simply subtract one value from another or not Similar situation might be with other tests - that is why manufacturer is stating that reading should be done at the certain time, not sooner, not later because this is how the color scale got calibrated. No comments to this, Maestro ? |
Just Checking
"Pszemol" wrote in message ... "boooger" wrote in message m... In your hypothetical example if the test kit only reduces 50% of the nitrate than the math still works. Only if you KNOW it is 50%. But you dont know that! It is not given on the carton box with the test... It is not published on the manufacturer website. How will you know ? Will you calibrate yourself ? How do you know it's not 95% or 98% or 100% ? Assume I have 30 ppm nitrate and 10 ppm nitrite and the test kit reduces 50% of the nitrate. Now I will have 15 ppm + 10 ppm nitrite. The test kit will give a value of 35 ppm nitrate (15 ppm + 2*10 ppm). Now measure nitrite and multiply by a factor of 2 and you get 20 ppm nitrite. (15 ppm +2*10 ppm) - 20 ppm = 15 ppm nitrate. Get it? Where do you get the factor of 2 ? Why not factor of 3 or 5 ? Get it ? Factor of 2 because in your example you state only 50% reduced. Therefore you have to multiply your nitrite test results by a factor of 2 so they equal the calibration scale in the nitrate test. I need a proof which shows the basic assumption is true. Show me proof for more than 95% of nitrates being reduced in aquarium grade test kits available in aquarium stores. Show me proof that it doesn't. Your claim is that you can do simple math to get nitrates using aquarium tests, even while nitrites are present... Your simple math works only when you set asumption, but you cannot prove your assumption to be true. This does not hold! You can not prove your assumption that it does not hold. Note - we do not use cooper-cadmium reducing towers... We just dump a little cadmium dust in the vial and shake the vial. Who knows how much nitrates gets reduced! I am referring to STORE bought test kits. None that I have seen use cadmium dust. What do you think they use ? Yes, they do use unoxidated metal - cadmium or zinc - usually delivered in suspension... That is why you are asked to shake the bottle # 2 for 30 seconds (to lift cadmium dust from the bottom of the bottle) before you use it. I misunderstood you. I usually don't refer to particles in a suspension as "dust". My Aquarium Pharmaceuticals test is bright yellow when there are no nitrates, and goes through orange to dark red-orange at high nitrates. Reading done at the time given in the user manual (5 minutes) differs from the reading done after 1/2 hour... Based on this observation I conclude that during standard 5 minutes time not all nitrates get reduced Based on this observation YOU assume. Your conclusion is an assumption. |
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"boooger" wrote in message m...
"Pszemol" wrote in message ... "boooger" wrote in message m... In your hypothetical example if the test kit only reduces 50% of the nitrate than the math still works. Only if you KNOW it is 50%. But you dont know that! It is not given on the carton box with the test... It is not published on the manufacturer website. How will you know ? Will you calibrate yourself ? How do you know it's not 95% or 98% or 100% ? I do not know - you do not know either. You can only guess. If you can guess 95%, I can guess 20%, 50%, 75% - anything else. It could be even worse than that - it could be that Tetra test reduces only 20%, AP test reduces 45% and HACH test 70%... You have NO IDEA! :-) These tests are for nitrates only, so they do not provide any information needed in your "math". I asked you for the source of this number and you cannot provide it. Assume I have 30 ppm nitrate and 10 ppm nitrite and the test kit reduces 50% of the nitrate. Now I will have 15 ppm + 10 ppm nitrite. The test kit will give a value of 35 ppm nitrate (15 ppm + 2*10 ppm). Now measure nitrite and multiply by a factor of 2 and you get 20 ppm nitrite. (15 ppm +2*10 ppm) - 20 ppm = 15 ppm nitrate. Get it? Where do you get the factor of 2 ? Why not factor of 3 or 5 ? Get it ? Factor of 2 because in your example you state only 50% reduced. Therefore you have to multiply your nitrite test results by a factor of 2 so they equal the calibration scale in the nitrate test. BUT YOU, THE USER OF THE TEST, DO NOT KNOW WHAT THE FACTOR IS. Get it ? I need a proof which shows the basic assumption is true. Show me proof for more than 95% of nitrates being reduced in aquarium grade test kits available in aquarium stores. Show me proof that it doesn't. Your claim is that you can do simple math to get nitrates using aquarium tests, even while nitrites are present... Your simple math works only when you set asumption, but you cannot prove your assumption to be true. This does not hold! You can not prove your assumption that it does not hold. You cannot give me the source for your 95% "guess". This is the proof that your story does not hold. Note - we do not use cooper-cadmium reducing towers... We just dump a little cadmium dust in the vial and shake the vial. Who knows how much nitrates gets reduced! I am referring to STORE bought test kits. None that I have seen use cadmium dust. What do you think they use ? Yes, they do use unoxidated metal - cadmium or zinc - usually delivered in suspension... That is why you are asked to shake the bottle # 2 for 30 seconds (to lift cadmium dust from the bottom of the bottle) before you use it. I misunderstood you. I usually don't refer to particles in a suspension as "dust". That's ok... :-) My Aquarium Pharmaceuticals test is bright yellow when there are no nitrates, and goes through orange to dark red-orange at high nitrates. Reading done at the time given in the user manual (5 minutes) differs from the reading done after 1/2 hour... Based on this observation I conclude that during standard 5 minutes time not all nitrates get reduced Based on this observation YOU assume. Your conclusion is an assumption. At least I have my observations to back up my assumptions. You have NOTHING to back up your 95%! You just guessing. You just pulled this number who know where from... It is called wishful thinking, my friendly Ant! So do your homework and prove it is over 95%. Back up this statement with some REAL data... |
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How do you know it's not 95% or 98% or 100% ?
I do not know - you do not know either. You are correct, YOU DON'T KNOW. The thing is, I DO KNOW. Don't want to believe me? I don't care Grasshopper! You want to dispute me and I am stuck with the burden of providing "proof" ? It doesn't work this way. YOU are disputing me, therefore YOU provide proof that supports YOUR claim. GOOD LUCK Grasshopper! |
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"boooger" wrote in message m...
How do you know it's not 95% or 98% or 100% ? I do not know - you do not know either. You are correct, YOU DON'T KNOW. The thing is, I DO KNOW. No, you do not. You only guess. Wishfull thinking. Don't want to believe me? I don't care Grasshopper! You want to dispute me and I am stuck with the burden of providing "proof" ? It doesn't work this way. Yes, it does - you are the teacher - prove you KNOW it. YOU are disputing me, therefore YOU provide proof that supports YOUR claim. GOOD LUCK Grasshopper! You are funny... you pulled the number out of your ass and you want me to believe you - why should I ? I am not! You make a claim - prove it. But you cannot prove your statement. Your statement is Booooooooogggguuuuss. Good teacher could point me to the data for the statement. You cannot - this proves again you are not a teacher :-))) I do not know what exact percentage gets reduced - I can see what is important: this is not even close to 95% because you would not see the color change after longer time... So here it is - a prove that your statement is BOGUS! |
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I think that only happens with test kits that test
nitrogen nitrate, instead of testing NO3. For example, Marine Enterprise NO3 and Tetra NO3 will test accurately. Wayne Sallee Wayne's Pets Pszemol wrote on 9/25/2006 9:47 PM: "b o o g e r" .@. wrote in message m... Sounds fine. It appears that your ammonia levels are no longer rising because it is being metabolised into nitrite and your nitrite into nitrate. This might be a good time to check your nitrate levels. Eh, booger - you do not know enough to be my teacher! This is bad advice... no point of measuring nitrates with aquarium kits, yet! They all work reducing nitrates to nitrites first, and then showing the level of nitrites... So if in your test sample are any detectable nitrites than your nitrates test will be way skewed towards too-high nitrates. Wait for all nitrites to be gone and than you can conclude that your tank finished the cycle. |
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"Wayne Sallee" wrote in message nk.net...
I think that only happens with test kits that test nitrogen nitrate, instead of testing NO3. For example, Marine Enterprise NO3 and Tetra NO3 will test accurately. I do not think it makes any difference what is the scale calibrated to. They all will have only fraction of nitrates reduced to nitrites and nitrites present in the sample will interfere with the proper reading of nitrates... Nitrites in the sample aquarium water just make nitrate test inacurate enough to not do it at all. |
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"Pszemol" wrote in
: "Wayne Sallee" wrote in message nk.net... I think that only happens with test kits that test nitrogen nitrate, instead of testing NO3. For example, Marine Enterprise NO3 and Tetra NO3 will test accurately. I do not think it makes any difference what is the scale calibrated to. They all will have only fraction of nitrates reduced to nitrites The reduction reaction of cadmium or zinc with nitrate is pretty efficient. Given good contact and agitation with fresh metal, about 95% reduction of nitrate to nitrite can be expected. http://lachatinstruments.com/downloa...ALNReprint.pdf That link references column and cup methods of automated nitrate testing, but the principle of the reduction reaction is the same. If you can lay your hands on ASTM test methods, the number for Nitrate- nitrite testing in water is ASTM D 3867-04, which corroborates the above reduction efficiency. Given that ASTM methods are sold for profit, there isn't a link I can point you to for the test method, other than the one which sells the pdf for 48 bucks; http://www.astm.org/cgi- bin/SoftCart.exe/DATABASE.CART/REDLINE_PAGES/D3867.htm? L+mystore+hbqn6245 There might be a book containing these methods in your local library... Regards, DaveZ Atom Weaver |
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"atomweaver" wrote in message ...
The reduction reaction of cadmium or zinc with nitrate is pretty efficient. Given good contact and agitation with fresh metal, about 95% reduction of nitrate to nitrite can be expected. http://lachatinstruments.com/downloa...ALNReprint.pdf That link references column and cup methods of automated nitrate testing, but the principle of the reduction reaction is the same. I am not arguing effectiveness of the method in the lab... I am talking exclusively about aquarium grade test kits here. The principle might be identical, but resulting process might be not as efficient when done in a test tube as when it is done in the lab, in a properly designed reducing column... And that is the problem here. |
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"Pszemol" wrote in
: "atomweaver" wrote in message ... The reduction reaction of cadmium or zinc with nitrate is pretty efficient. Given good contact and agitation with fresh metal, about 95% reduction of nitrate to nitrite can be expected. http://lachatinstruments.com/downloa...ALNReprint.pdf That link references column and cup methods of automated nitrate testing, but the principle of the reduction reaction is the same. I am not arguing effectiveness of the method in the lab... I am talking exclusively about aquarium grade test kits here. The principle might be identical, but resulting process might be not as efficient when done in a test tube as when it is done in the lab, in a properly designed reducing column... And that is the problem here. Meh. Get cadmium or zinc in contact with nitrates, and you're going to get a good conversion of nitrite. All the "powder plus dropper" test kits I've used have a _large_ excess of metal vs. anticiapted nitrates in the measured range of 0-100 ppm Nitrate. Check out this math; If you're testing 1 mL of water with 10 mg/L Nitrate, it contains 0,01 mg of Nitrate (=0,00001 g). In most test kits, you're adding about 10,000 times that amount (0,1 g) of reducing agent, by weight. No, I don't think that much, if any, nitrate will remain unreduced, regardless of the operator. I get your general drift (people are inept, test kits can have old, unreliable contents), but follow the instructions with fresh reagents, and the home kits give accurate enough numbers. That's not to say that home kits aren't problematic... just that failure to reduce nitrates to nitrites isn't a likely scenario. More likely is for test error to come in the form of (mis)reading the test's end-result (cruddy colorimetric comparison charts, or some such). An aside; This paper investigated how high phosphate levels in samples evaluated with the cadmium test can impact your nitrate values by interfering with the reduction reaction, giving you readings to the tune of up to 25% low nitrate values. http://aslo.org/lo/toc/vol_25/issue_4/0758.pdf Something to remember... I also read somewhere there's an enzyme reduction method out there which is highly selective (none of the common interferences, 99% reduction)... gotta love those little bugs :-) Regards, DaveZ Atom Weaver |
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Think about this also Pzemol: If only a small fraction of the nitrate is
getting reduced during the time frame of the test then you would have different results depending on 'your' room temperature. You would have a high nitrate reading in the summer and a lower nitrate reading in the winter. The zinc reduction of nitrate is a redox reaction which is temperature dependent. In order to minimize the effects of temperature on the outcome of the test, the test must be very efficient (greater than 95%) in reducing nitrate. Are you stating to feel a little silly now? :) |
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"boooger" wrote in message ...
Think about this also Pzemol: If only a small fraction of the nitrate is getting reduced during the time frame of the test then you would have different results depending on 'your' room temperature. You would have a high nitrate reading in the summer and a lower nitrate reading in the winter. My room temperature does not change much between summer and winter. I use heater in winter and A/C in summer... how about you ? ;-) And yes, temperature should affect the reading. Same as time does. I have already written about time. Can you explain why there is a color change between the reading done in 5 minutes and reading done (on the same sample) in 1/2 hour ? Are you stating to feel a little silly now? :) No, I am not... How about you ? Can you point me to any aquarium test kit manufacturer who states the nitrates reduction rate of their test ? Or you still stand behind this wishful thinking 95% which is true for the lab methods and not necesairly for aquarium tests? |
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My room temperature does not change much between summer and winter.
I use heater in winter and A/C in summer... how about you ? ;-) I assume this is a tongue in cheek response. And yes, temperature should affect the reading. Same as time does. I have already written about time. Temperature will have very little effect on the testing process if the reaction rate is fast to begin with. As is the case here. Can you explain why there is a color change between the reading done in 5 minutes and reading done (on the same sample) in 1/2 hour ? Are your test reagents for measuring nitrate in to separate bottles or one? Are you stating to feel a little silly now? :) No, I am not... How about you ? Can you point me to any aquarium test kit manufacturer who states the nitrates reduction rate of their test ? Or you still stand behind this wishful thinking 95% which is true for the lab methods and not necesairly for aquarium tests? Yep. I stand behind it. I stated several times the reaction goes to 95% complete, NOT 95%. |
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"bOO0ger" wrote in message ...
Can you explain why there is a color change between the reading done in 5 minutes and reading done (on the same sample) in 1/2 hour ? Are your test reagents for measuring nitrate in to separate bottles or one? 2 bottles. Are you stating to feel a little silly now? :) No, I am not... How about you ? Can you point me to any aquarium test kit manufacturer who states the nitrates reduction rate of their test ? Or you still stand behind this wishful thinking 95% which is true for the lab methods and not necesairly for aquarium tests? Yep. I stand behind it. I stated several times the reaction goes to 95% complete, NOT 95%. Repeating the same thing over and over does not make it more or less true than after the first time - show me the proof! |
Just Checking
Are your test reagents for measuring nitrate in to separate bottles or
one? 2 bottles. Have you ever wondered why they don't put all the reagents in one bottle? The answer should help explain your question. |
Just Checking
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Just Checking
"Wayne Sallee" wrote in message nk.net...
Since the last used bottle is the same ingredient in both the nitrate test, and nitrite test kit, being that they are both testing for nitrite, I wonder if the concentration in both bottles is the same. No Wayne - nitrite test is one bottle with water-like liquid inside, heavy colored. 2nd bottle of nitrate test is very heavy/dense transparent liquid with metal dust. They are not the same. |
Just Checking
"bOO0ger" wrote in message m...
Are your test reagents for measuring nitrate in to separate bottles or one? 2 bottles. Have you ever wondered why they don't put all the reagents in one bottle? The answer should help explain your question. Explain... And do not forget showing me the proof for your " 95%" statement. |
Just Checking
Have you ever wondered why they don't put all the reagents in one bottle?
The answer should help explain your question. Explain... Think about some more and take more than 30 minutes. Hint: What is the reagent in bottle #1? And do not forget showing me the proof for your " 95%" statement. This has already been proved. |
Just Checking
That should have read: Think about IT some more and take more than 30 minutes. AND Hint: What ARE the reagentS in bottle #1? |
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