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ph test strip

  1. Discrepency with pH tester

    Beginner Freshwater Aquarium
    I recently got a package of individually wrapped Mardel test strips, and when I tested my water for pH the number was showing up as lower than 5.5 each time. I was worried because I have snails in my tank, so I went to the store intending to get crushed coral to gradually bring my pH up...
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