Recent content by TheEng

@JoyfulNoise. I thought ORP was great indicator of the pools ability to oxidise compounds. Controller Concepts: ORP and Oxidation Part I | PPOA Quote from above link. Extremes showed up in pH from 5.7 through 8.3, combined chlorine from 1.4 to 34 ppm, free chlorine from 0 to 30 ppm, cyanuric...