I just moved and used the move as a good excuse to change my tank from the gravel up. Once we moved, I filled the tank(which was cleaned thoroughly with water and a little vinegar for the harder spots of algae.) and the next day added about 150lbs of Estes Black gravel. I have two Marineland Penguin Biowheel 350s running on the tank with shower scrubbies in one and some "supercartridges" in the other. I have not decided for sure about my final filtration and I've been a bit busy to buy the actual filter cartridges. Its been running for about 4 days now and the tank is milky white and smells like a can of tuna. I don't know what that is from because the tank was cleaned and rinsed out, as were the filters. Any algae or slime or residue was cleaned off with a credit card and a toothbrush. I haven't started to cycle the tank yet, but will the stink and cloudiness clear when I do? Any ideas on what would cause the smell/color?