john starkey
Fishaholic
Hi all, would it be beneficial to let the co2 run through the filter out take and back in through the return pipe.
thanks john.

Depends on what filter you have. You need to be careful that you don't airlock it.
I just run my CO2 into the return pipe just before the spray bar which does the job for me.
I add CO2 to the filter inlet on one of my tanks, but it is via a ceramic diffuser, rather than just letting the CO2 bubble straight in. I have never had any airlocking using this method on an AquaEl 250, but just admitting the CO2 bubble whole could be a different story.
Dave.
I add CO2 to the filter inlet on one of my tanks, but it is via a ceramic diffuser, rather than just letting the CO2 bubble straight in. I have never had any airlocking using this method on an AquaEl 250, but just admitting the CO2 bubble whole could be a different story.
Dave.