GWAPA

[chris_todd]

Sean, how do you have your sumps setup so you don't lose dissolved CO2?

[SCMurphy]

I have the outflow pipes from the tank entering the sump underwater. I also use the black hose they sell for ponds on the ends of the pvc to make the water enter the sumps sideways. I bubble the CO2 into the intake of the return pump.

I do not have overflows, I have constant level siphons made from PVC, so there is no waterfall effect.

[chris_todd]

Gotcha, thanks for the info!