How to Balance your Pool Water Chart


Balance water chart

To ensure your water is balanced we have created the following chart with ideal levels and the recommended HTH® Pool Care products necessary to adjust your levels.


What is it?

When to test

Ideal Range

Product used to adjust levels


A measure of the water's acidity

Every day


hth® pH increaser or hth® pH decreaser

Free Available Chlorine (FAC)

The amount of active chlorine in the water

Every day

1-4 ppm when using chlorine as the sanitizer.

Any hth® granular or tablet chlorine sanitizer according to label directions

Total Alkalinity (TA)

The water's ability to keep pH at a proper level

Once a week

60-120 ppm

hth® alkalinity increaser

Total Hardness (TH)

The amount of dissolved calcium in the water


Acceptable: 200-1000 ppm, Ideal: 200-500 ppm

a calcium hardness increaser

Cyanuric Acid (CYA) / Stabilizer

The amount of stabilizer available to prevent the degradation of Free Available Chlorine (FAC) caused by the sun's UV rays

Twice a season

Ideal: 20-50 ppm, DO NOT EXCEED 90 ppm

hth® stabilizer


Please read the following important reminders before adding pool chemicals to water:

• NEVER mix products together or dissolve before use.

• ONLY enter pool when FAC levels are below 4 ppm to prevent risk of bodily harm.

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