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🎁🎁【Perfect Partner--7-in-1 Aquarium Test Strips】Monitor 7 important parameters accurately: Hardness, Nitrate, Nitrite, Cl2, Total Alkalinity, Carbonate, and PH. 👍👍【 Easy to Use and Read】Dip a strip in the water and take it out 2 seconds later, wait for 60 seconds, and then compare the strip with the color chart printed on the bottle. ✔️✔️【100 Strips, 100 Tests】The strips are made from high-quality fibers, which will not be penetrated or stained, you can get 7 vital parameters of the water each time, which saves you money and time.