[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Tom in Austin writes:
> are two racks in this in-tank sump, one for mechanical filtration of the
> main thank (DLS and sponge) and another to hold bioactive media for use in
> hospital tank if it become necessary.
Sponges are biological filters. Yes, they trap the dirt, but they also
provide excellent surface area for bacterial colonization. In fact, ANY
really effective mechanical filter will support large bacterial colonies
because of their large surface area/volume ratio.
Cichlid Trader List Administrator º o