Using the Bleach Calculator program which offers a CYA calculation. For a 22000 gal pool it would take 3 pounds 8 ounces to raise the from 40 to 60.

It's a handy little program, it can be downloaded here at the forum.

Russell

Quote Originally Posted by poolbee
I see. Thanks. The more I understand, the fewer questions I'll have later on. I do know how to change the power level and will do so as soon as I get more CYA. I have an approx. 22,000 gallon pool. How much CYA do I need to add to increase it from 40 to 60?

As always, thanks!