3 Ways to Lower High Cyanuric Acid in Your Pool

Drain and refill the pool Partial draining and refilling is the most reliable method. No chemical or filter can remove cyanuric acid, so dilution is the only guaranteed fix.

Hire a reverse osmosis truck RO trucks can filter out CYA without draining, but they are expensive and may not be available in your area. If they are, this is your best alternative to a full drain.

Slowly dilute through backwashing Top off with fresh water after each backwash over several weeks. This works only if your CYA is not extremely high and you are not in a hurry, but it still uses a lot of water.