Originally Posted by Erikmichael23
So I hear the bio wheel can produce nitrate problems...is this true?
I think this assertion comes from the fact that the bio-wheel creates a very aerobic (oxygen rich) area for bacteria to grow on. These bacteria are usually the one responsible for reducing ammonia to nitrite and nitrite to nitrate. The bacteria that convert nitrate to nitrogen are typically anaerobic, so that part of the nitrogen cycle doesn;t happen there. it doesn't mean it can't happen somewhere else it the tank nor does it mean you cannot manage nitrate via regular partial water changes IMO
FWIW I have heard the same thing about bio balls in a wet dry filter. In the end, I figure the nitrate produced is primarily a function of the animals in the aquarium (vs the filter system) and there are just different methods of managing the nitrate load.