As for the 6.5 pH. My tank is at 7.5 without co2 . it is my understanding you need a 1.0 drop in pH to get 30ppm co2 saturation. I have 2 drop checkers . one on each end of the tank, just for good measure , and added security check points. Thery turn blue when co2 is off , and go to green when it is at its set point of 6.5. I also have a pH controller connected to my regulator sylenoid. It holds co2 dead on 6.5 all day. It comes on one hour before lights on and goes off 30 min before lights out. My fish seem to be very active , and the same all during the co2 hours. And yes it is micro bubbles that are being produced , . since I have two hob filters churning the surface , I do have to pump in a high rate of co2. I am looking into a canister filter to help with this problem. Any way to inject the co2 into the canister filter to help diffusion? Or not?
Last edited by rick dale; 01-11-2015 at 05:46 PM.