15,000 gallon semi-inground oval pool. Vinyl liner. Hayward AquaRite Low Salt Chlorine Generator (1200-1800ppm) but currently running at 2000ppm. Hayward TurboCell. Hayward Super Pump 700 single speed. Hayward ProSeries High Rate sand filter. Natural gas heater. I also use the Taylor CK-2006 test kit for all my water testing.