Re: Planted tank with Sump Issues. It's hard to know what the cause is without more info. Try to minimize water surface disturbance. Where you inject CO2 in the system may make a difference (in flow, out flow, in the sump, in the tank). I am running a 75 with a sump. I inject CO2 with an inline diffuser that is in the plumbing which goes from the sump to the tank. I use a pH moniter to regulate the CO2 and I've had no problems keeping the CO2 levels I want and the pH pretty low (7.0 at night when the CO2 is off, down to 6.2 - 6.3 during the lighting period). You can check out my journal (linked below) to see my setup. |