Hey guys I need a little help on this before Im fishless. Got a used fish tank on Saturday. I was filthy so I scrubbed it but put back 50% of the original water for bacteria purposes. Now I notice a white film over everything: in the gravel, on the plants and on the rocks. One of my fish also developed what looked to be fin rot so I ran to the store to get some fungus eliminator. I got back to get a better look at him and now he seems to have Ich. Water tests normal except for the Nitrate being like 160ppm. I didnt think that I had to cycle the tank because It was already in use but I guess I was wrong. Could the fungus and the Ich be from the move in conjunction to the Nitrate. How can I get my Nitrate down and quick?