Important Made in USA Origin Disclaimer: For certain items sold by on the displayed country of origin information may not be accurate or consistent with manufacturer information. For updated, accurate country of origin data, it is recommended that you rely on product packaging or manufacturer information. Just dip an AquaChek Yellow strip in your pool or spa water for one second, and remove it immediately. You get test results in seconds To keep your pool at its best, test at each end at least twice a week, and test your spa before each use. It's also a good idea to write down your results each time you test, so you can track changes.Comes with complete instructions in 15 languages: English, French, Spanish, Italian, Czech, Danish, Dutch, German, Greek, Hungarian, Polish, Portuguese, Russian, Swedish and Turkish.1 buy = two 50 strip bottles 100 strips total Just dip an AquaChek Yellow strip in your pool or spa water for one second, and remove it immediately. You get test results in seconds To keep your pool at its best, test at each end at least twice a week, and test your spa before each use. It's also a good idea to write down your results each time you test, so you can track changes. Comes with complete instructions in 15 languages: English, French, Spanish, Italian, Czech, Danish, Dutch, German, Greek, Hungarian, Polish, Portuguese, Russian, Swedish and Turkish. 1 buy = two 50 strip bottles 100 strips total - 2 AquaChek 511244 Yellow 4 in 1 Test Strips - 100 strips total - Results in seconds - Tests for Free Chlorine, Cyanuric Acid, pH and Total Alkalinity - 50 strips per bottle - [Click Here][1] to view product insert - Part #: 511244 - - 1 Year VMInnovations Warranty\n [1]: http://www.aquachek.com/product_images/AC_Yellow_Insert.pdf

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