I have a 10 gallon tank that has been set up for years. I only have 1 red serpae in it. He's the fish from hell that's why he is in a tank by himself. I went crazy one day doing a water change and I upset the tank. The water is cloudy and has been for weeks and there are so many bubbles at the top of the tank. I'm doing my water changes and the bubbles seem fewer after the change but after a week or so the top of the tank has tons of bubbles again. At first I thought how could I have gotten soap in the tank. It's not soap. Any hope here? Or just clean out the tank and start again? Again we are talking 1 fish. Thanks for your help.