AquaChek Yellow 4-in-1 Test Strip

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AquaChek Yellow 4-in-1 Test Strips Tests for: Free Chlorine, pH, Total Alkalinity, Stabilizer (Cyanuric Acid) Yellow 4-in-1 is designed for customers who use chlorine in their pool or spa: the go-to product for testing the most critical parameters in your pool. You'll find the easy-to-use flip-top cap conveniently dispenses one strip at a time. AquaChek Yellow is a great choice when getting started with pool testing. pH: 6.2-8.4 Free Chlorine: 0-10 ppm Total Alkalinity: 0-240 ppm Stabilizer (Cyanuric Acid): 0-300 ppm Comes with complete instructions in 15 languages: English, French, Spanish, Italian, Czech, Danish, Dutch, German, Greek, Hungarian, Polish, Portuguese, Russian, Swedish and Turkish. Show more