Turning off CO2 at night
I have a small CO2 rig I just set up. Paintball canister with an ASA on/off, pressure gauge and needle valve, attached to a check valve, bubble counter, and diffuser. I want to turn the CO2 off at night to maintain a stable pH for my shrimp. Can I just turn off the CO2 via the ASA on/off and then turn it on in the morning? I wouldn't need to mess with the needle valve right?