Hello, I am new to this forum and I need some help. I have a 55, 2 20s and a ten. The 55 gal has been set up for over a month now and I have been testing the ammonia and nitrite levels constantly to watch how it has been progressing in becomming an established tank. I had treated the tank with benificial bacteria (SuperBac) and stuff like that to help it along in the process. Recently I have been testing it and the ammonia went down to 0 and the nitrite was getting there too, I was so happy because I thought it was finally about to become established. To my surprise a couple days ago I went to turn on the lights and the water started becoming cloudy, I had just put in a filter pouch that is supposed to take out the nitrites and stuff like that the night before so I thought it was because of that. I tested the water and the nitrite and ammoina levels were as high as the test would read them, and of course I freaked out thinking my fish were going to die. I havent added any extra fish to the tank, actually I have removed some because I had 5 preg platies. I checked everywhere in the tank, there are no dead fish, all the plants are alive and green, I dont over feed and I have been cutting back since on food even more since I found out just incase that was the problem. So I did a small water change probably about 25% and its still testing high. Yesterday I was looking at the top of the water and it looks like there is a film on it that was never there before. There is plenty of airation in the tank, there is four under gravel tubes going, a sponge filter and a decoration that has an air stone in it. The bubbles coming out of the tubes and everything dont look right, they are really big, not fine like they used to be. I checked the air stones and they are all clear and working well. The tank just keeps getting cloudier and cloudier and I dont know what else to do. I have been using some Ammo Lock to protect the fish and Amquel to remove some of the ammonia and nitrites. I have cleaned the rocks very good, the carbon was just replaced, the sponge filter doesnt have any obstructions and like I said I have checked the plants for anything that might be dying and removed it. Im really lost now, my mom was so scared for the fish she did a large water change yesterday and the fish were breathing a lot better and the water cleared up a little. I woke up this morning and its very cloudy again. Any advice would be much appreciated, I have had tanks before and never had this much trouble with them. Please help before its too late!!