View Full Version : Dual Canister filters with DIY Co2

06-15-2014, 11:09 AM
I have a 20G long tank with an Eheim Classic 2213.
Have Co2 flow via a glass diffuser under the output.
Thinking of adding an Eheim Ecco 2232 canister filter.
Do I put 1 output on each side or both on 1 side?

06-16-2014, 07:23 AM
I put one output on each side in my tank with 2 canister filters.