Hello. I’m a 2nd year owner of a 20k gallon above ground pool. I’ve spent both seasons so far battling constant minor algae issues before I realized that I was under chlorinating my pool (simple math error on my part) but, now that I got that straightened out, I think my CYA is too high. I’ve been using the small chlorine tablets that are added everyday to the skimmer. Not sure wether it’s dichlor or trichlor, but it too has stabilizer in it. I’m using a Taylor K2006 FAS DPD test kit. My number for today,(07/15/19) were:
Water temp 87
Free chlorine- 4.5ppm
Combined chlorine- between .5 and 1 ppm
Ph-7
Total alkalinity 70 ppm
Calcium hardness- 75 ppm
Cya 70ppm
Not sure if CC could be .75, but at .5 the test tube stil had the slightest tinge of pink.
Thanks for all your help. John.
Water temp 87
Free chlorine- 4.5ppm
Combined chlorine- between .5 and 1 ppm
Ph-7
Total alkalinity 70 ppm
Calcium hardness- 75 ppm
Cya 70ppm
Not sure if CC could be .75, but at .5 the test tube stil had the slightest tinge of pink.
Thanks for all your help. John.