Too much CO2! How to get the levels down?
Im just getting my CO2 going and I think I put way to much in it. I was in bed and my GF noticed my gourami was dark, I got up and saw all the fish at the surface so I shut the CO2 off and used a hose to blow some air in the water. Should I do anything else? I dont think Im going to loose any fish but I want to get it back to safe levels so the fish arnt so stressed.