Best Seller | HYDRION CH-1000 Test Strips,Detects Free Chlorine,1/4" W Test Strips, Test Form Strip, Overall Length 2 3/4 in, Test Type Test Strips, Testing Parameter One Free Chlorine, Overall Width 1/4 in, Parameter Measurements Included 0 to 1,000 ppm Free Chlorine, Number of Tests 100, pH Resolution Not Applicable,... ... more HYDRION CH-1000 Test Strips,Detects Free Chlorine,1/4" W Test Strips, Test Form Strip, Overall Length 2 3/4 in, Test Type Test Strips, Testing Parameter One Free Chlorine, Overall Width 1/4 in, Parameter Measurements Included 0 to 1,000 ppm Free Chlorine, Number of Tests 100, pH Resolution Not Applicable,... | | $11.65 go to store |