These things are wonderful! I will never go back to slow sinking and counting. Those API tests that you can get from petsmart cost about the same price as this one. But I say you'll be glad you did. They're a little expensive. I buy the important ones individually every few weeks and they work great. I'm telling you they are more accurate than the API, trust me.
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FUNSWTM 7 in 1 Aquarium Test Strips: Accurate Water Testing for pH, Nitrite, Nitrate, Chlorine, GH & KH Levels
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Fish Water Quality API Test Kit
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