Hello, I have a 20k gallon gunite/plaster pool. My pool was finished with plaster (don't know the type, just that it's white) when the investors flipped the house I bought. By the time escrow closed, the pool was filled and I started taking care of it. As of right now, here are my levels (tested with my DPD Taylor kit, K-2600 I believe):
Temp = 86 - 92 °F (I keep it in this range with a solar cover)
FC = 6.0 - 8.0 ppm (I keep it in this range all the time using 12.5% NaOCl)
CC = 0 ppm (I use monopersulfate to shock every week)
pH = 7.5
TA = 180 ppm
CYA = 70 ppm
Filtration = DE filter
I haven't measured my CH, but I do know that where I live the water is very hard. Anyways, I brush & vacuum every weekend and the water stays crystal clear. That is, until I have a bunch of people in the pool. I know that the chlorine levels aren't to blame, since I test the water during the peak of a pool party and maintain the safe level of FC, also I never detect CC. Also, I add shock before and after the party. What I think they're doing is kicking up the plaster and clouding the water. I also notice plaster dust kick up when I brush. In the shallow end where most people hang out, the plaster has worn thin. The worn spots look bluish. There are some chips down to the gunite, which I'm going to patch with some compound.
My question is: is this normal wear & tear on the plaster, or did the pool tech who refinished it do a poor job? It's just frustrating that everytime I have a pool party I get a cloudy pool and have to use clarifier to cleear it up.
I searched the forums, but nothing really answered my question. I appreciate any help you can give me. Thanks in advance!