About a week ago I cleaned my fish aquarium. I put in a new filter and cleaned the rocks an put in clean water. I know it takes a awhile for it it clear up but it has been a week and it looks worse than before. My two goldfish are ok. They are still swimming happily and don't seem to mind. But I can not see them too well or the moss plant. It looks so dark What did I do wrong. Is there something else that can be done.