ok, so i have aquired a 10 year old 55 gal. it came with 4 fish. a very large pleco(about a foot or more), a large white fish(dont know what kind) not an oscar. a albino cat, and a tiger barb. the tank was in the worst condition i have ever seen. i dont think it was cleaned in over a year. it was caked with poop on the bottom and algae everywere. i relocated the tank to my house, and cleaned as much as i could. the silicone in the tank has a perminant layer of algae on it that i cant get off. im wondering if the water will ever be crystal clear or will it always have a cloudyness to it. the tank is pretty old and im wondering if its the tank making it cloudy. any input would help.