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Anyone seen this? 1.0 Summary A swimming pool is an aqueous solution of interacting chemicals that determine appeal and safety for swimmers. The chemistry varies widely, depending on what is added to the pool. In recent decades, there has been an increasing trend towards domestic outdoor...

FC: 10.4 cc: 0 TA: 75 ppm CH: 400 ppm cya: 100+ pH: 7.4 Have pool service. My cartridge filter keeps clogging often. I can almost clean it daily. pressure rises 10-20 psi after a few days. no debris in pool. water is almost crystal clear. when my filter gets full the pressure goes to 40...