Description
Stay on top of your water chemistry with the Valterra Blue Devil OTO Solution B7021, a compact 1/2-ounce reagent refill formulated for precise chlorine level testing in pools and spas. Engineered for seamless compatibility with Blue Devil Test Kits, this solution delivers dependable color-change readings so you can verify that sanitizer concentrations remain within safe parameters. Consistent chlorine monitoring is the cornerstone of crystal-clear water, helping you stay ahead of algae blooms and harmful bacterial buildup. Simply dispense the recommended drops into your water sample following the kit instructions, then match the resulting hue against the included reference chart for an instant chlorine reading.









