3 Reasons to Drain Your Pool Instead of Using CYA Reducers

CYA reducers don’t work well enough The bacteria in those bottles is slow, finicky, and rarely lowers cyanuric acid enough to fix a truly high level. You’ll likely end up draining anyway.

High CYA makes chlorine useless Once CYA is too high, chlorine can’t do its job. Dumping more shock in won’t help, and the pool store’s solution is a waste of money.

Draining is the only reliable fix CYA doesn’t break down naturally, so removing the water is the only sure way to lower it. If you can’t do a full drain, a partial drain of 25–50% is still better than any chemical shortcut.