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On Tue, 12 Sep 2006 19:37:52 -0500, dc wrote:
wrote in news:1158089791.785515.162800 : This is what I've been hearing about charcoal... If no charcoal then what? Biological filtration and good husbandry. What is "biological filtration"? dick |
#2
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![]() "Dick" wrote in message ... What is "biological filtration"? That the process where certain bacteria turn ammonia to nitrites, then another bacteria turn the nitrites to nitrate. Both ammonia and nitrites are toxic to fish. Nitrates are not unless excessively high. -- KL.... Frugal ponding since 1995. My Pond & Aquarium Pages: http://tinyurl.com/9do58 ~~~~ }((((* ~~~ }{{{{(ö ~~~~ }((((({* |
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On Wed, 13 Sep 2006 09:30:36 -0500, Köi-Lö $##$$@$##$$.#$$ wrote:
"Dick" wrote in message .. . What is "biological filtration"? That the process where certain bacteria turn ammonia to nitrites, then another bacteria turn the nitrites to nitrate. Both ammonia and nitrites are toxic to fish. Nitrates are not unless excessively high. One does not filter "in" or "out" bacteria. Nitrates are not biological, they are just chemcals. The bacteria are the active agents. Every pond is full of bacteria, all doing special things. No filter, I can imagine, would be classified as "biological filtration." Why would one want to filter out bacteria? dick |
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Dick wrote in
: No filter, I can imagine, would be classified as "biological filtration." Why would one want to filter out bacteria? Your semantics are very limited. Biological filtration is a widely used term to describe the natural process of the nitrogen cycle. It has nothing to do with the "filtering out of bacteria", which doesn't even make sense. Bacteria will adhere to any surface where it is able to obtains the means for it to survive--it exists in every part of your filter. Biological filtration describes the action of biological organisms (bacteria) on organic chemicals (nitrogenous wastes) as they convert them into various, and progressively less toxic forms. |
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![]() "dc" wrote in message ... Dick wrote in : No filter, I can imagine, would be classified as "biological filtration." Why would one want to filter out bacteria? Your semantics are very limited. Biological filtration is a widely used term to describe the natural process of the nitrogen cycle. It has nothing to do with the "filtering out of bacteria", which doesn't even make sense. Bacteria will adhere to any surface where it is able to obtains the means for it to survive--it exists in every part of your filter. Biological filtration describes the action of biological organisms (bacteria) on organic chemicals (nitrogenous wastes) as they convert them into various, and progressively less toxic forms. DC for calm under fire I hereby award a distinguised service medal. Well done man. |
#6
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![]() "dc" wrote in message ... Dick wrote in : No filter, I can imagine, would be classified as "biological filtration." Why would one want to filter out bacteria? there are many mechanical filters capable of your so called 'straining out' bacteria the common ones used in the hobby both use plant cells that have been signifigantly altered. The carbon/charcoal already mentioned and also the good old diatomous Only really used to 'polish' water in hastily built displays in my experience as with established bio filtration they are rarely needed in general aquaria. Your semantics are very limited. Biological filtration is a widely used term to describe the natural process of the nitrogen cycle. It has nothing to do with the "filtering out of bacteria", which doesn't even make sense. Bacteria will adhere to any surface where it is able to obtains the means for it to survive--it exists in every part of your filter. Biological filtration describes the action of biological organisms (bacteria) on organic chemicals (nitrogenous wastes) as they convert them into various, and progressively less toxic forms. |
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Dick wrote in
: What is "biological filtration"? A natural process that occurs everywhere in nature that involves the recycling of nitrogenous byproducts into various forms. The cycle is incomplete in aquaria and generally is limited to the conversion of ammonia into nitrite and nitrite into nitrate. The first two byproducts are very toxic and can kill fish in short order when found in quantity, the last byproduct is many times less toxic than the others and generally only increases stress levels and the chance for shock and infection when found in very high quantities. In nature nitrate is further converted into nitrogen. Without biological filtration every fish in your aquarium would be dead right now. |
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On Wed, 13 Sep 2006 18:16:55 -0500, dc wrote:
Dick wrote in : What is "biological filtration"? A natural process that occurs everywhere in nature that involves the recycling of nitrogenous byproducts into various forms. The cycle is incomplete in aquaria and generally is limited to the conversion of ammonia into nitrite and nitrite into nitrate. The first two byproducts are very toxic and can kill fish in short order when found in quantity, the last byproduct is many times less toxic than the others and generally only increases stress levels and the chance for shock and infection when found in very high quantities. In nature nitrate is further converted into nitrogen. Without biological filtration every fish in your aquarium would be dead right now. The subject of this thread is "activated Charcoal. You have taken some effort to describe, what appears to be, a natural process. Even mention of "biological filtration" would appear to be off topic. Mechanical filtration and their relation to charcoal would be close to the subject. Why did you insert your "biological filtration" know how into a discussion about "activated charcoal"? dick |
#9
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Ah, perhaps I shouldn't feed the troll....
Because biological filtration is totally relevant. Activated carbon, especially in the quantities used in some filters (ug filter tube intakes being the worst case I can think of), isn't necessary in a well-kept aquarium and can even be detrimental to plants. Methinks he's just a troll, though, as that comment re filtering bacteria was just plain stupid. Ciao. Dick wrote: On Wed, 13 Sep 2006 18:16:55 -0500, dc wrote: Dick wrote in : What is "biological filtration"? A natural process that occurs everywhere in nature that involves the recycling of nitrogenous byproducts into various forms. The cycle is incomplete in aquaria and generally is limited to the conversion of ammonia into nitrite and nitrite into nitrate. The first two byproducts are very toxic and can kill fish in short order when found in quantity, the last byproduct is many times less toxic than the others and generally only increases stress levels and the chance for shock and infection when found in very high quantities. In nature nitrate is further converted into nitrogen. Without biological filtration every fish in your aquarium would be dead right now. The subject of this thread is "activated Charcoal. You have taken some effort to describe, what appears to be, a natural process. Even mention of "biological filtration" would appear to be off topic. Mechanical filtration and their relation to charcoal would be close to the subject. Why did you insert your "biological filtration" know how into a discussion about "activated charcoal"? dick |
#10
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![]() Dick is not a troll.....he has an easy way of looking after his fish without needing to be a chemist....if it works for him why should any the rest of us disrespect his experience...it might not work for all of us but afterall a good water change and tank maintenance regime is really the answer to a lot of ills....you don't need to be a chemist to know this....just a good fishkeeper.... Gill |
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