Hardness Test Strips For Dishwasher, Pool, Drinking Water ...
Hardness Test Strips For Dishwasher, Pool, Drinking Water, Aquarium, Spa Upgrade: The total hardness test strips have 5 LEVELS and 4 PARAMETERS that improve the test efficiency and accuracy makes these strips more trustable, you don't need to visit a hardware store or wait for someone else to check the quality of your water, save your money.
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