Well I got my 36G cycled. It has a full hood on it but the previous owner let it sit outside so it accumulated mold on the underside of the lid... SO I cleaned it off the best I could when I set it up. Well today I lifted it and it stinks like mold and its back on the light cover and underside of the lid. The water has a film on it looks like. I am not sure what I should do. Is it safe for fish? It has driftwood in it too could that be the film?