CYA Removal Kit two-part system for reducing excessive levels of cyanuric acid in swimming pools. This revolutionary two-part system works without the need to drain or dilute water from a pool. It takes cyanuric acid (also known as CYA, stabilizer or conditioner) out of pool water. Prolonged use of stabilized chlorine can cause CYA levels to build up over time. CYA Removal Kit reduces high levels of cyanuric acid to help you achieve the ideal range for a swimming pool of 30-50 ppm.