Cyanuric Acid

Cyanuric Acid (CYA)

CYA (also called stabilizer or conditioner) protects chlorine from UV degradation from sunlight. Without CYA, chlorine will degrade quickly in direct sunlight.

Some CYA is a good thing (50 ppm or less), but too much CYA (over-stabilization) is a bad thing.

CYA lowers the LSI and slows chlorine down. The speed of chlorine (%HOCL) is barely impacted by pH when CYA is in the water... chlorine strength is determined by the free chlorine to CYA ratio (FC:CYA).

Learn more about pH, chlorine and CYA here.