I just set up my first c02 reaction using citric acid and sodium bicarbonate. I was was so focused on getting the bottle pressure right that I did t realise quite how much had gone in. I have turned it off, removed the airline and turned up my sponge filters. It was on for about 15 minuits and the fish are gasping at the surface. I have put the lights back on so the plants can use some of it up. Is there anything else I can do to help them? I feel a bit stupid now.