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I own a Hydropool hot tub purchased in either 2004 or 2005 and I am getting a "FL" message. From what I can tell from reading the owner's manual, it is most likely from the diaphragm in the pressure switch having a mineral build up due to improper water maintenance. Our hot tub had little use over the summer (hot Ohio summer) and we neglected to maintain it properly. I know, I know, pretty stupid. Anyway, some jets have also fallen out of the sockets. We previously used Brilliance products with test strips and it seems I was constantly trying to get the right balance. I never really got the hang of how to maintain the water properly. I am currently at the point of having to disconnect the breaker and reconnect it in order to turn the pump on. It will run for a while and bring the temperature back up but then quits with the "FL" message. Would anybody have advice on the following:1. How to determine the correct pressure switch to order and directions to install it;2. What's the best way to get the jets to stay in (get rid of build up);3. What's the best chemicals and water tests to use.Any advice would be appreciated.