Just Checking
 

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.

Just Checking
 

"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?

Just Checking
 

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!

Just Checking
 

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?

Just Checking
 

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?

Just Checking
 

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.