I'm setting up my first tank and read several books and read tons on the net about it and asked lots of questions from the dealer but I seemed to have totaly missed everything on cleaning the sand before putting it in the tank and filling with water. Heres what i have 150 oceanic tank with sump ,210pounds of sand and 75 pounds of live rock, the water took 2 days to clear up to a cloudy level and every time I do anything to the inside of the tank it turns cloudy again, My question is do I need to drain it and clean the sand and start over?? I asked the dealer and he said to leave it but before I add fish I do not want a cloudy tank, I would appreciate any insight from you pro's. I want to start out right the first time.