Started getting the pool ready for winter yesterday. Removed stairs, brushed and vacuumed. Water analysis was as follows:
FC 3.5
CC 0.5
PH 8.0
CH 25
TA 70
SALT 2130
CYA 50
Water temp 48 degrees F
My target for slamming was an FC of 20 (based on CYA OF 50). So I added 264 oz of 10.8% chlorine along with 4 oz muriatic acid to lower PH to 7.8 at 2:40 in the afternoon. There was a bit of sun on the pool for a few hours following so I retested at 7:40 in the evening. FC was 17 and PH still 8.0. I added additional chlorine to bring FC back up to 20, along with another 4 oz of acid. Tested this morning and FC still 17 and PH 8.0. Should I add more chlorine until it stays at 20??? The sun is rising and the pool will have another 8 hours or so of sun now. Or do I call it good and start draining and cover pool. And what about PH?
FC 3.5
CC 0.5
PH 8.0
CH 25
TA 70
SALT 2130
CYA 50
Water temp 48 degrees F
My target for slamming was an FC of 20 (based on CYA OF 50). So I added 264 oz of 10.8% chlorine along with 4 oz muriatic acid to lower PH to 7.8 at 2:40 in the afternoon. There was a bit of sun on the pool for a few hours following so I retested at 7:40 in the evening. FC was 17 and PH still 8.0. I added additional chlorine to bring FC back up to 20, along with another 4 oz of acid. Tested this morning and FC still 17 and PH 8.0. Should I add more chlorine until it stays at 20??? The sun is rising and the pool will have another 8 hours or so of sun now. Or do I call it good and start draining and cover pool. And what about PH?