Review on Accurate And Versatile - 7 In 1 Test Strips For Pools, Spas, And Hot Tubs - Perfect For Home And Commercial Water Testing by Mack Douglas

I maintain a 200,000 gallon pool. The test strips do well for chlorine, ph, hardness, and alkalinity. Absolutely terrible for Cyanuric Acid (CYA). I have compared to a liquid test kit by Taylor. The Taylor kit has been incredibly accurate for everything. If I didn't have another test kit and I just used these strips I would have been up the creek without a paddle. The test strips said little to none. Meanwhile cya has been through the roof on occasion and the test strip showed no indication of that