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Dear all, Here is the testing results by Leslie after the pool is opened. I already bought some stuffs from Costco. Any recommendations? I don't want my CYA increased too much. How can I keep my FC and other chemical balance? I bough Taylor testing kits last year, it is expired. Can I still use...

Hi Richard, Appreciate your help to understand my circulation system. When I turn off the valve in same of bad check valve, the water in Spa are not dropped anymore. Today, I just replaced the bad check valve, and open the valve in the same pipe line. I will check the water level in Spa again...

Thanks for your information. I am using DE filter. My contractor told me the mystery line is SPA Jets.

Dear all, Would you please help to see how my circulation system works? Right now, my pump in is closed for SPA, and pump out to SPA is open to force the circulation of my SPA water. But after pump stop work, the water in SPA is dropped to main strain. My pool contractor is closed pump out to...