I got my hand on a 120 gallon tank that was set-up as a salt water aquarium for many years. I want to make the tank a fresh water set-up for my living room. The tank is in fair conditions but I cant get the glass to be clear. I have been using vinigar for a while and it helped but did not solve the problem. so then I used other stronger household detergents. Does anyone know what I might be able to use to clean the whitish bloches on the tank.