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I am the proud owner of 2 pools. The 16000 gal inground vinyl in Iowa which obviously has to be winterized. About 30% of the water is removed in the fall and replaced with fresh water in the spring. Each spring I add 1 to 2 gallons of stabilizer to achieve 30 to 40 ppm cya. 4 3" tabs per week in...

Is anyone familiar with Jandy Valve JVA 2444? There is one installed on my Helio Matic Solar Panel heater. The control panel has a thermostat to activate/deactivate heater. My question, should the handle on the Jandy Valve move as the thermostat changes? Mine does not, is it broke?

Why does the ph climb from 7.2 to 8.0 in a week. I add muriatic acid to decrease to 7.2 and in a week or so it's right back up to 8.0. TA is 110 ppm. 15000 gallon in ground pebble tech in Tucson Az

Did chemistry check on 16000 gal. pool yesterday. Ph 8.2, TCL 1.0, TA 110, CYA 70. Added 32 oz muriatic acid, brought ph level down to 7.4, but now the CYA test shows less than 30 ppm using Taylor 2000 test kit. How do I get an accurate CYA test?