I topped off my water about 20 min ago it was about an eigth of a gallon. I only have a ten gallon but I top off the same amount of water daily. Now my fish (two clowns) are gaspping for air. They were perfectly fine a minute ago. What is going on? All chem levels are the same as usual. What could be happening. One clown even went behind the rocks and dissapeared, It has never done that. They don't fight at all either. thanks



