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My CYA was 70 this week during a SLAM I was doing. Chlorine source was 6% chlorine bleach... that is it! It rained very hard after I finished the SLAM. I gained a lot of water in the pool that day. The next day I went back to vacuum and check levels.... CYA went from 70-100! After a rain...

I have a 33k in ground. There is algae. Here are my numbers FC 6.6 pH 7.3 Cya 80 Alkalinity 40 When I did the calculations, it’s saying to add 975 oz of 10% liquid chlorine... I’m scared to add that much to the pool at one time! How do I make sure it doesn’t bleach the liner???? Help!!!!

I am looking to replace my sand filter. Not sure what size to get. I have a 10,000 gal AG and a 1.5 hp pump. My last filter was a hand me down so I know nothing about buying a filter. Any input is greatly appreciated! :o

FC 0 TC 9.1 CC 9.1 pH 7.0 TA 0 Hard 230 CYA 5ppm Copper 0 iron 0 Pool went blue to green over night! I've seen worse so I super chlorinated... No good. Shocked again next night and did Hth green to blue. It would look clear in morning and then get green as day goes on... Took water to pool...