Hello, first time poster here. Please go easy on me. I'm having a very hard time getting my pH below 8. Adding about 32-40 oz of muriatic acid a week from the hardware store. I've read that since our plaster is about a year old that may be contributing.
Complicating this is the fact I added NoPhos from Leslie's about 6 weeks ago (took over pool care 8 weeks ago) when our level was 600. Since then we've had white flakes in the pool (improving with time). I've cleaned our filters twice (4 weeks apart)and run the Sigma vacuum every 3rd day or so in the spa and pool. The scale in our negative edge spa on horizontal surfaces (glass tile) keeps coming back rapidly after I use a red rubbery calcium brush. I've run in spa mode to get more water through the filters to no avail. Flakes look like a fine particulate dust, some bigger. Water is crystal clear otherwise.
Any advice appreciated. Thanks.
Recent test results
PH = 8.2
FC = 4.8
CC = 5.0
CH = 360
TA = 110
CYA = 30
Complicating this is the fact I added NoPhos from Leslie's about 6 weeks ago (took over pool care 8 weeks ago) when our level was 600. Since then we've had white flakes in the pool (improving with time). I've cleaned our filters twice (4 weeks apart)and run the Sigma vacuum every 3rd day or so in the spa and pool. The scale in our negative edge spa on horizontal surfaces (glass tile) keeps coming back rapidly after I use a red rubbery calcium brush. I've run in spa mode to get more water through the filters to no avail. Flakes look like a fine particulate dust, some bigger. Water is crystal clear otherwise.
Any advice appreciated. Thanks.
Recent test results
PH = 8.2
FC = 4.8
CC = 5.0
CH = 360
TA = 110
CYA = 30