We purchased a 20 gallon starter kit tank at a local pet store. Also purchased two Tiger oscars, Four Tiger Barbs and two sucker fish. None of the numbskulls at the store bothered telling us about the breakin period for the tank. Amonia was out the roof and PH was extremely low. Lost all of the TIger barbs and almost lost my Oscars. Went to an aquarium "specialist" and purchased more filters, Prime and Marine Buffer. also did a 50/50. the shock dang near cost me my oscars again. to the point of floating on their sides at the top of the water gasping and no fin movement. two days later purchased a bigger, better filtration system and the amonia level is in the safe zone according to the Tetra Test strips i purchased. fish are a 1000 times more active and back to themselves. More we have this very cloudy (white) water and the Nitrite and Nitrate are in the "Danger" zone according to the Tetra Test strips. Any suggestions?