This is what you want to do if you plan to use co2. If there's surface agitation, the co2 will gas out. Canisters are the only filters that won't agitate the surface.Canister with a pre-filter on the intake.
I use an eheim 2211 on my 2 ft planted.This is what you want to do if you plan to use co2. If there's surface agitation, the co2 will gas out. Canisters are the only filters that won't agitate the surface.