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Had what appeared to be mustard alge so dbl shocked pool, after 24 hrs pool cloudy and fc about 2. Last night added about 130 oz of chlorine and this morning pool still cloudy and no chlorine. So shocked again. What now. ph 7.4, ta 80, cya 50

Moved from here. Is it best to drain water from bottom of pool or from top level since it seems the extra 1.5 feet of rain over the last month is not changing my cya very much. I see it around 40 something but pool stores says 50 to 61 from 4 different testing sites. Old eys makes it hard to...

Having hard time figuring out how to do the chlorine test with this powder stuff. Followed directions and put 2 scopes (level?) into water and it turned red. Started to do drops and it took 13 to neutralize but don't know what that means. My other kit just does chlorine reading but no free...

Tested pool and most stuff looked good but cya was over 80, so based on that I replaced about 4000 gallons of water. Now I heard or read u need to wait for about 7/10 days and test again. My question, will it be higher or lower right after replacing the water or after waiting time period. Just...

How could the cya drop from 53 to 5 in 6 days. Shocked pool and added 15lbs hardness increaser to raise calcium. Made no other adjustments and all chlorine levels went to 0 as well. Does this make sense.

Just had new liner installed but was done on rainy cool day and after filling about 15" notice a lot of wrinkles. Pool installer said it would be week or so before he can return to assess the situation and fix. Should I leave the water, lower the water or will it effect the liner that much in a...