Hayward pro series sand model s310t....it's big. And the hayward super pump hp2.0 and 2" inch plumbing...I hope this helps. Water temp 72 degrees
Ph 7.2
Alk 80
Chlorine 11
Cya about 45
I don't know how to test for anything else(lost directions), but I do have the Taylor and an aqua chem(started buying good tests 2 years ago thanks to this site).
Anyways, chlorine has been at an 11 for almost 2 days...not dropping even in sun, so it makes me question if I am performing the cya test correctly as I don't know why it isn't dropping. Never had that problem before. I have no clue what was used to open the pool as a pool guy does come and do that while I am not here(I called and he left message saying 6 bags of a powder chlorine and algeacide). I have this every year when opening the pool. Always gets better if I continue to vacuum to waste 2 x a day to get rid of the algae on bottom for about a week. Should I continue that route or does some of his chemicals need to burn off, but I still want to know reasons for chlorine holding so long....after his initial dose of chlorine, those levels stayed for 3.5 days without dropping. I'm sorry, I'm having total opposite problems than usual and have no clue what I am doing.