We were away on vacation and there was lots of rain back home. Chemistry must've been thrown off and pool was green. Can only see about 6" to 1' down clearly. Started SLAM right away (last Friday). Ph was 7.2 when starting. CYA was 40 (5,000gal above ground). Since Saturday (1 day in) free chlorine has been kept between 16 and 22. Combined chlorine has always been 0. Filter has been on 24hrs since starting (sand filter). There is no improvement. Did a SLAM when opening the pool this season and it took about a week and a half to clear, but at least there was some progress day to day. Not sure what else to try. Thank you for your help.
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Test Results 08-05-2021 @ 08:15 AM
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Free Chlorine: 21.0
pH: 7.2
Total Alkalinity: 80
Calcium Hardness: 350
CYA: 40
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Test Results 08-05-2021 @ 08:15 AM
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Free Chlorine: 21.0
pH: 7.2
Total Alkalinity: 80
Calcium Hardness: 350
CYA: 40
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