The same math the Poolably app uses, free in your browser. No signup, no email — enter your numbers and get a dose you can act on today.
Gallons for rectangle, round, oval, and kidney pools. The number every dose depends on.
CYA-aware free chlorine targets and exact doses for liquid chlorine, cal-hypo, and dichlor.
How much cyanuric acid to add — and when the only answer is draining water.
Pounds of salt to reach your SWG's target, in plain bags.