"The 5-in-1 Paper Tester is used to measure pool water. You can measure free chlorine, alkalinity, pH, total water hardness, cyanuric acid. High measurement accuracy. Just dip...
The 3-in-1 Paper Tester is used to measure pool water. You can measure free chlorine, alkalinity, pH. High accuracy measurement. Just dip the strip in water, wait 10 seconds and...
"Paper tester for measuring peroxide or sanosil in water (pool, whirlpool, well...) - 50 pcs of measurements
Dip the entire paper into the water under test for 5 seconds. Do not...
"Paperwork tester for measuring the hardness of pool water - 10 measurements
Dip the entire paper into the water being tested for 1-2 seconds. Wait 60 seconds. Compare with the...