Check the listing for details. Aquachek Yellow Pool 50pk Spa Test Strips. Condition: New. Listed at 12.99 USD. This is for 1 bottle of 50 pack test strips for your pool or spa. Expiration date of late 2021 or later. Tests for Chlorine, PH, total alkalinity and cyanuric acid. These are in stock and shipping is fast and free! Please check our feedback! Thank you! AquaChek® Yellow Tests for Free Chlorine, Cyanuric Acid, pH and Total Alkalinity 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 a minimum of 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. Comes with complete instructions. 50 strips per bottle. AquaChek Yellow has added directions in 15 Languages to the product insert! English, French, Spanish, Italian, Czech, Danish, Dutch, German, Greek, Hungarian, Polish, Portuguese, Russian, Swedish and Turkish. • Cyanuric Acid (Stabilizer) • Free Chlorine • pH • Alkalinity Posted with eBay Mobile