Well-known member
May 2, 2012
How much cya by pounds of powder should I be adding for a 22500 gal pool. I used the calculator and checked with a couple other sources and there is a big difference. One source says 40 pounds. Another says 20. Please help.


Mod Squad
TFP Expert
Platinum Supporter
LifeTime Supporter
In The Industry
Apr 1, 2007
Sebring, Florida
Did you have a problem entering the data into the calculator? If the information is entered correctly, it is correct.

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TFP Expert
LifeTime Supporter
Jun 24, 2011
Long Beach, CA
I'm getting 15lbs. of CYA to go from 0 to 80 ppm for 22,500 gallons. I suggest adding half the amount and test in one week, then add the right amount to get you to 80 ppm if you are running a SWG. Easier to add more, difficult to remove excess CYA.