Friday night we bought a 10 gal. tank with all of the accessories. We set it up and let it run for 24 hours. We then added 4 tiger barbs and a 1 red tailed shark. We had also added Proper pH 7.0 because the pH levels were reading a little high. Within half an hour the water was so cloudy you couldn't see the picture in the back. Within 5 hours all 5 of the fish were dead. We remove them and when we woke up this morning there was a layer of white milky stuff and the filter also had a good 1/4" coat of white creamy stuff on it. We have tested the ammonia levels and everything is fine. But we can't get the tank to clear. Can someone please help us?