Hello, I just bought my aquarium this tuesday, and bought about 8 fish. What I observed is that one pair or yellow bright fish ( don't remember the name now...) were pretty nice and bright on the shops fishtank, but they've turned pale, also a pair of blue ones. I asked the shop guy and told me it was stress, and I poured the quantity that he told me of anti stress solution. What might be another problem that is causing that my fish lose it's color? It's a 20 gallon freshwater tank. And also... there's this layer of tiny tiny bubbles on the water surface and the water looks a bit cloudy cause it's full of bubbles, anyone know what might be the problem? PLS HELP! THanx A L O T!!!