Here in Kamloops they have RO out of the tap it is also UV sterilized I also use a comersial filter system as it take out any impurities porcilin carbon filter I can obly get replacments filter cartiges from the manufaturer. They use these filter in places like oOrange Julious and Tim Hortons to name a couple. It will take the alcohol out of alcohol to leave you with pure water. The water in my tank has got to be pritty good. just don't leave your lights on a reverse cycle 16 hours a day for more than 1 day algea blooms I can tell you first hand. I made a mistake programming a new timer. I am going to have to get one of those power bars that have a timer on it.

Bill