[herns]

[STRIKE]Im running an Eheim Ecco 2232 filter for my 20G and thinking of getting another one in addition to my Ecco.

Does having a multiple filtration do any good than a single one?[/STRIKE]

I just found the answer in this thread: Fltration Turn Over Ratio.

http://www.plantedtank.net/forums/equipment/91205-filtration-turn-over-ratio.html