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Grade your water from your test numbers and get a fix list linked to each calculator.

Gallons/liters by shape: rectangle, round, oval, kidney.

Liquid or cal-hypo dosing, plus a breakpoint-chlorination shock mode.

Soda ash to raise pH, muriatic acid or dry acid to lower it.

Baking soda to raise TA, muriatic acid (aerate method) to lower it.

Calcium chloride to raise CH, an honest drain-and-refill calculation to lower it.