Thanks, based on the info I've received here I am trying to return the ozonator I just bought, but the pool company is giving me problems and trying to tack on a 24% restocking fee and other charges that add up over $100 for a %278.00 item. They say they have never had one returned and they stand behind their product but their policy also says returns are no questions asked if not satisfied for any reason. The restocking fee is not even stated in the return policy. I am glad I found this forum so I can cut out all this malarkey with the pool companies. Keep up the good work