How much stabilizer for your pool, by size

Stabilizer (cyanuric acid, also sold as conditioner), as granules or liquid. Pick your pool size for a full dose table, or use the calculator for any volume.

Pick your pool size

Pool size	Dose
1,000 gallons	1.3 oz per 10 ppm
2,000 gallons	2.7 oz per 10 ppm
5,000 gallons	6.7 oz per 10 ppm
6,000 gallons	8.1 oz per 10 ppm
10,000 gallons	13 oz per 10 ppm
15,000 gallons	1.3 lb per 10 ppm
18,000 gallons	1.5 lb per 10 ppm
20,000 gallons	1.7 lb per 10 ppm
25,000 gallons	2.1 lb per 10 ppm
30,000 gallons	2.5 lb per 10 ppm

Any other size

Add

3.8lb

of Stabilizer granules (cyanuric acid 99%)

61 oz1.7 kg

Raises CYA from 10 ppm to 40 ppm in 15,000 gal.

Also raises cyanuric acid (stabilizer). It only comes down by replacing water.
Put the granules in a sock in the skimmer basket or in front of a return. Do not backwash for a week.
Stabilizer takes several days to dissolve and register on a test. Do not add more in the meantime.
At CYA 40 your free chlorine minimum becomes 3 ppm and the target 6 ppm.
Adding too much is hard to undo: only draining lowers CYA. If unsure, add three quarters, wait a week and retest.

Check the product label. Strengths vary by brand, so enter the % printed on yours. Add one chemical at a time, into the water, and never mix chemicals.

Save this test and get reminded when it is time to retest.

Pool Calc for iPhoneComing soon to the App Store

How much stabilizer for your pool, by size

Pick your pool size

Any other size

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