30,000 gallon pebble-tec in-ground pool. Circupool RJ60+ Salt System. Pentair VSP/VSF pump, One Touch indoor controller, SpaLink controller, iAqualink integrated system- pump, spa, SWG, lights. Kreepy Krauly. Rooftop Solar heater (on pool pump). Taylor K2006 & K1766 test kits. SoCal, near Los Angeles - sunny and hot. Local well water, very hard with rising calcium always a problem. Commercial water softener tank with exchange resin, changed out every two months.