just purchased a tank with filter and a heater. i no little about tropical fish but ive been told to fill up the tank run the heater and filter and apply a biological aquarium supplement and then leave for 24-48 hours before introducing 2 fish. ive put 2 bags of pepples/stones in the bottom of the tank but rinsed them before putting them in the tank. well after running it all for about 4 hours my water is still cloudy have a done somthing wrong? i have little knoweledge about this so any help would be a great help. Also what are good fish for starter fish?