Should I lower CYA?

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C

csmdew

Active member
Feb 17, 2020
27
Florida
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 tell when black dot disappears. thanks
 
If you need to drain water due to CYA, in an above ground pool, it does not matter. Once the pump runs the water is fully mixed.

Has the pool over run during all that rain or has it just filled it back up due to evaporation?

Follow your testing, not pool stores.
 
Oh it has over run several times and I have drained off several thousand gallons of water as well, but each time I test it looks to be about the same cya level and I have hard time telling when black dot disappears so I take some to the ace hardware for test. Usually my numbers are very close to theirs. Last test looked around 40 and 1 ace said 46 and another said 56. Lots of alge this year and last yr cya was 90+ and never any alge, makes no sense.
 
Using liquid and maybe 1 tablet every 2 weeks, takes that long to dissolve, last yr 2 a week. Liquid is sometimes hard to find. Need a swag but still have a new one on hand that is too small for this pool, bought for smaller pool and then gave pool away.
 

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