UV Protection & Stabilizer
Pool CYA (Cyanuric Acid) Calculator
Calculate the exact amount of dry cyanuric acid or liquid pool conditioner needed to protect your chlorine from UV sunlight degradation.
Pool CYA / Stabilizer Calculator
Protect free chlorine from UV destruction
10,000 gal
10 PPM
40 PPM
Required Stabilizer+30 PPM Boost
Dry Cyanuric Acid (Stabilizer)
2.44 lbs
(39 oz / 1.11 kg)
Recommended Pool Conditioner
Use 99% pure dry Cyanuric Acid granular stabilizer. Dissolve in a bucket of warm water or pour slowly into the skimmer.
Check Pool Stabilizer Price on AmazonImportant Application Note:
CYA takes 48 to 72 hours to fully dissolve in pool water. Do not backwash your filter for 3 days after adding dry stabilizer through the skimmer.
CYA Dosing Formula & Rule of Thumb
To raise CYA by 10 PPM in a 10,000-gallon pool, add approximately 13 oz (0.81 lbs) of dry stabilizer.
Dry Stabilizer (lbs) = Pool Volume (Gallons) × (Target CYA − Current CYA) × 0.000081Related Water Balance Tools
Frequently Asked Questions About Pool CYA
Everything you need to know about Cyanuric Acid, chlorine stabilization, and ideal targets.
Cyanuric acid (CYA), often called pool stabilizer or conditioner, acts as sunscreen for free chlorine. Without CYA, UV rays from sunlight destroy up to 90% of free chlorine in under 2 hours.
For standard chlorine pools, target 30–50 PPM. For saltwater chlorine generator pools, target 60–80 PPM, as salt cells require higher stabilization to keep up with continuous chlorine production.
It takes approximately 13 ounces (0.81 lbs) of dry cyanuric acid per 10,000 gallons of pool water to raise CYA by 10 PPM.
CYA does not evaporate with water. The only reliable way to reduce high CYA is to drain a portion of your pool water and refill with fresh tap water.