EXC Pentair Cyanuric Acid Test Kit | R151226

The Pentair Rainbow R151226 is a #79 Specialty Test Kit designed to accurately measure cyanuric acid (CYA) — also known as stabilizer or conditioner — levels in pool and spa water. Maintaining proper CYA levels between 30 and 50 ppm is critical to chlorine performance, as levels below this range accelerate chlorine loss to UV exposure, while levels exceeding 70 ppm can significantly reduce chlorine's sanitizing effectiveness. The kit uses a slide-calibrated test stick and 8-ounce bottle of melamine reagent (R-0013) for a simple, reliable positive readout — fill the test tube to line A with pool water, add reagent to line B, mix for 30 seconds, and read the result by looking down through the solution until the black dot on the test stick disappears. Results are expressed directly in parts per million of cyanuric acid. Packaged in a clear-top styrene box with complete instructions included.

Highlights

• Accurately Measures CYA in Parts Per Million: Uses Pentair's proven melamine reagent (R-0013) and slide-calibrated test stick to deliver a fast, reliable cyanuric acid reading — helping pool owners maintain the ideal 30–50 ppm stabilizer range for maximum chlorine efficiency.
• Positive Readout Design for Easy Results: The unique black dot readout method eliminates guesswork — simply look down through the solution from the top of the test tube and note when the black dot on the test stick disappears to obtain an accurate, positive CYA reading.
• 8 oz Reagent Supply for Extended Testing: Includes a generous 8-ounce bottle of R-0013 melamine reagent, providing enough supply for multiple pool seasons of routine cyanuric acid monitoring without needing frequent reagent replacement.
• Protects Chlorine Performance: High or low CYA levels are one of the most overlooked causes of poor chlorine performance — regularly testing and correcting stabilizer levels helps ensure chlorine sanitizes effectively and pool water stays consistently clear and safe.
• Complete Kit — Ready to Test Out of the Box: Includes the test tube, slide-calibrated test stick, 8-ounce reagent bottle, and step-by-step instructions in a clear-top styrene storage box — everything needed for immediate, accurate CYA testing right out of the box.