AquaChek One-Minute Phosphate Test Kit, 20 Strips | 562227 Ladders & Slides If algae is still visible

If algae is still visible repeat dose (steps 3 & 4) as necessary until pool is free of visible algae

Always test your phosphate level before using Phos REMOVE

New Wave series nylon bristle brush

Do not use Clear and Perfect within 48 hours of using Metalfree™

AquaChek One-Minute Phosphate Test Kit, 20 Strips | 562227 Ladders & Slides If algae is still visibleAquaChek One Minute Phosphate Test Kit, 20 tests bottle One step, one minute phosphate test. Even low levels of phosphate can lead to algae in your pool or spa. This test uses powder pillows and vials, which offer increased sensitivity at the lower ranges. The powder pillows are less susceptible to damage by heat and humidity and offer a 5 year shelf life. Features and Benefits: Phosphate: 0 1,000 ppb Tests for phosphates in pool water in one minute