Co2 Problem.

[dcbaros]

I have a small nano reef (7 gallons) in a small apartment. The PH never rose above 7.6 and I never saw much coral growth. I have a kessil ocean blue for lighting. I brought the tank home for the holidays (I am at college) and the PH shot up to a constant 8.1. I assume that this is because of the excess CO2 in the apartment. I would open the windows occasionally and the PH would creep up but that is a pain to do every day. Are there any other options? I am considering upgrading to a larger tank but I have not yet made up my mind.