Planted Tank Guru
Join Date: Nov 2009
Location: Missouri united states
Well,filtration and flow are two different thing's in my view.
Good flow for distributing CO2/nutrient's to all areas is suggested, but I can't get on board with the 10X the volume of the tank per hour.
Filtration for me, is filtering out floating particulates, and reasonable flow is a plus to prevent the particulates from settling on the bottom where no filter (s) will pick it up.
I aim for 6 to 8 X the volume the tank holds to be turned over each hour.
Filtration don't mean squat if your not keeping the filter material cleaned regularly.
Monthly for me due in large part to soil based tanks,fairly high bioload.
You only truly remove what is not wanted in the tank by cleaning the filter(s)