Ben, Can i Pm you or have a email address as I want to discuss this further but not to the detriment of my business, as you know we run quite a big Pool maintenance service but we also have a shop for selling products now obviously the shop relies on the sales of the typical pool products and from this point of view not sure the BBB method would be good for this side of my business however for the pools we maintain we have a few with problems that so far I have not found a single product that has helped so what im thinking is using your method on for example 10% of our pools to see for myself if successful then we will use it for all. As with any normal company I am interested in things that cut the costs of the running and keep the pools in the same or better condition if my company can be in the lead this way then this is good for me and my business.