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.
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Item #511242

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Sale price $10.99