Hi, I was wondering if anyone might be able to help me with my problem. I recently was given a 55 gallon tank that had been sitting in a garage for some time. The tank has a white film on pretty much all sides of the tank and it is not coming off. Unfortunately, my roomate thought he was helping and sprayed it down with CLR solvent. So I guess my questions are: How should I get this film off of the glass? and How long should i soak the tank to rinse the solvent out? Thanks in advance.