Aquacheck Silver Test Strips 7-1 Chlorine. The AquaChek Silver offers 7 important tests on a single test strip. Now featuring an improved test for Cyanuric Acid (Stabilizer). It's much faster and easier to use than liquid test kits. It offers enhanced colors for greater color distinction and easier readability. 100 test strips per bottle. Test for Cyanuric Acid (Stabilizer) Free Chlorine Total Chlorine pH Total Alkalinity Total Bromine Total Hardness