The Aermax is a piece of junk. You will have nothing but trouble with them. I went on a service call this week and the customer had one of them from Culligan. He told me that within weeks, Culligan sold him a chlorinator to solve the problem. You may not have bacteria right now, but what is in place to prevent it in the future? Chlorination/dechlorination is the best and least expensive in the long run. If you really don't want chlorination, look into greensand media.