Does Kordons NovAqua contain bacteria that remove nitrate from the water ?
NovAqua does not contain any bacteria and does not remove nitrogen compounds such as nitrate. See the NovAqua product data sheet for further information. It is a common misunderstanding in aquaristics that nitrate is harmful to fishes. In fact it is mostly harmless. However, it is a good indicator of other nitrogen compounds being present that are harmful. The higher the nitrate level in the aquarium water, the more there are other compounds present that are harmful to fishes. The only way to measure these compounds is by using a nitrate test kit and getting the answer second hand. See the sections on water test kits and the nitrogen cycle for further information.
