Originally Posted by unda_da_sea
the aerobic is the bio wheel or anything that contacts air? and the anerobic would be anything submerged that can grow nitrifying bacteria?
Kind of. Aerobic bacteria utilize O2
. They can be found on surfaces under water as well as the bio-wheel. They bio-wheel provides them more O2
to feed from, aiding nitrification, by allowing direct contact w/ air. Anaerobic bacteria grow in O2
deprived areas, like deep in LR
. These are the bacteria that can turn NO3
into a gas, allowing it to leave the aquarium. Many times PWC
's are needed, as well, for sufficient NO3
As kurt said, it would really help to know what kind and how big the fish are.?