@chem geek

Hi, Does anyone know where the forum member Chem Geek is? He gave me some excellent advice several years ago when I was overhauling my hot tub. I don't see him here at the moment. Thanks - D

I'm a victim to the CYA disappearance after FC went to zero when the SWG stopped while out of town. Last known CYA was around 40. Given the warm temperatures and sunny days, I'm limited to SLAMming in the evening/overnight so not to lose FC to sunlight given the high SLAM FC levels. After...

I just pebble plastered my new spa & pool 20,000 gal. Started filling 5/21 filled 5/22. Day 2 full of water and just got my DE for the Quad DE filter! Current chemistry pH: over 7.8 Total hardness: 239 mg/ml CaCO3 (how do I adjust this down to the 150 ppm minimum?) Cl2: 0 Total alkalinity...