After a pretty long period of stability my pH has started rising about every 10 days. I add muriatic acid to pH of 7.2 and aerate. My alkalinity drops as expected but bounces back up in just a couple of days with out adding any. Evaporation is pretty high (temps in mid 90's here) and I haven't checked alkalinity in my tap water. Not wanting to chase pH but don't want a bunch of scaling. Should I continue what I'm doing or is there something I need to do to return to more stability?
Current parameters (13 month old plaster pool, SWG)
pH 8.0 (before adding MA today)
Alk 99
Ca 400
CYA 80
FC 6.0
Salt 4000
Temp 89°
CSI +0.39
Current parameters (13 month old plaster pool, SWG)
pH 8.0 (before adding MA today)
Alk 99
Ca 400
CYA 80
FC 6.0
Salt 4000
Temp 89°
CSI +0.39
