My pool looks great but is not uncommon for it to lose 9.5ppm during the day and 3ppm overnight. I initially had my cya at 45, but a leak in the connector on the pump may have lowered it slowly. It is closer to 30 now. I added two trichlor 3" pucks to raise it a little to 35. I have the new part, not yet installed. I have been slamming for two weeks somewhere between 14ppm and 20ppm every morning and night. One week ago I started running the pump 24 hours a day and cleaned the cartridge. It had a lot of cotton from our popular trees. We no longer have this floating cotton. There is no visible algae but I must need to shock more often during the day?? I am going through 2 or 3 128 oz 10% liquid shock a day as it is. I usually only go to a local pool store for liquid shock, but I thought I'd have them tell me my phosphate levels. It was 200. Of course they sold me PhosFree and said I should add 7 oz. I have not done so. Does it help occasionally or avoid it at all cost? My husband does use a liquid fertilizer on the lawn. I wasnt sure if it could get in the ag and cause problems. We have a lot of cotton that gets in my pool in June. I tried to use hose in the skimmer basket to remove a lot. We rarely swim in the pool. We have used it like 10 times this summer. Do I figure in my loss and add ppm to my normal shock level which is 14ppm? So if I lose 3 a night, I shock at 17ppm? Here are my test results:
FC 9.5 at 8 pm (was 18ppm at 6am)
CC .5
PH 110
TA 7.7
CH 150
CYA 35
FC 9.5 at 8 pm (was 18ppm at 6am)
CC .5
PH 110
TA 7.7
CH 150
CYA 35