Join Date: Dec 2004
Location: Walnut Creek, CA
I built Rex's reactor. I added a venturi loop to put excess CO2 back into the system. I used rigid tubing, the size suitable for 1/4" air tubing, inserted into the top of the reactor. When the CO2 bubble gets too large the venturi loop siphons it back into the intake of the canister filter where it is chopped up by the impeller. Works fine.