Planted Tank Enthusiast
Join Date: Apr 2004
Location: Des Moines, Iowa
Valid questions are in no way stupid, as the saying goes, the only stupid question is one never asked.
To be sure, if you're tank is planted heavily enough, in my experience no bio filtration aside from what naturally occurs without media is needed. It is my understanding that plants will consume most fish waste before it even hits the cycle. I never have had measurable nitrites in my tank, and I have to dose to keep nitrates up.
I use mechanical filtration only, nary a problem.