Eric wrote: > Can you ever have too much biological filtration? ie. A Emperor 400 > (biowheel) filter and an undergravel filter? > Eric Martina I wouldn't think so, Eric. The more nitrifying bacteria, the better. The tank waste would be broken down even faster. If you have a moderately planted tank, I wouldn't use the biowheel. The plants act as natural biological filters. Jamie <"\\\>< Greenwood, SC ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!