50x Water Hardness Test Strips Fast And Accurate Water Testing Kits For Swimming Pool FishTank

Easy to carry: size about 1.46x3.94inch. Water tester with precise color coordination and high sensitivity, use professional for health drinking water test strips to test water standards. Soak the stripe- 2 seconds- for underwater, keep about 15 in the air, and then the color of the strip- to the color on the back of the bottle, which takes about 17 seconds. A pack of test strips includes 50 pool test strips and seals, 5 packages to long-term storage. The test strips are suitable for drinking water, aquarium-, swimming pool and industrial water, pond, hot spring water testing.