We have a 18x48 frame set intex pool. It holds about 5,580 gallons of water. We just filled it with water May 30. We have been adding muriatic acid 1 cup at a time to lower alkalinity. Yesterday we put a cup in at 10 a.m., another cup at 5 p.m. and one at 7:30 p.m. Alkalinity went from 320 to 290 back to 320 and this morning 290. Do I need to put more than I cup at a time? I get my PH up to 7.5 before adding more acid. These are my readings right now.


PH 7.0 ( I am aerating right now)
TC 5.0
CC 0
FC 5.0
Alk 290
Cya 0

Thanks
Peggy