In a 6,000 gallon pool, 8.1 oz (229 g) of stabilizer granules raises cyanuric acid (CYA) by 10 ppm. Taking fresh water from 0 to 40 ppm needs 2 lb (918 g). Liquid stabilizer is weaker by weight: 24 fl oz per 10 ppm.
| Change | Granules (99%) | Liquid (25%) |
|---|---|---|
| Raise 10 ppm | 8.1 oz | 24 fl oz |
| Raise 20 ppm | 1 lb | 0.38 gal |
| Raise 30 ppm | 1.5 lb | 0.56 gal |
| Raise 40 ppm | 2 lb | 0.75 gal |
| Raise 50 ppm | 2.5 lb | 0.94 gal |
| CYA 40 → 70 (salt pool) | 1.5 lb | 0.56 gal |
Add
2lb
of Stabilizer granules (cyanuric acid 99%)
32 oz918 g
Raises CYA from 0 ppm to 40 ppm in 6,000 gal.
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 StoreGranules dissolve slowly. Put them in a sock or the skimmer basket with the pump running, and don’t backwash for a week. CYA takes several days to show fully on a test, so don’t top it up before then.
Overshooting is the expensive mistake: nothing you can add lowers CYA, only replacing water does. If you are unsure of your volume, add three quarters of the dose, wait a week and retest.
Manual chlorine pools usually run CYA 30 to 50. Salt water pools run 60 to 80, because the cell makes chlorine all day. Your chlorine target rises with CYA: see the FC/CYA calculator.
At 6,000 gallons, most doses are measured in fluid ounces or ounces rather than gallons or pounds. Above-ground pools of this size usually have vinyl liners, so keep calcium hardness modest and add everything in front of a return jet, away from the liner wall.
8.1 oz of granular cyanuric acid per 10 ppm. From 0 to 40 ppm: 2 lb.
Granules can take several days to a week to dissolve and register on a test. Wait a week before adding more.
Only by replacing water. The drain and refill calculator shows how much.