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water test api

  1. API MASTER FRESHWTER KIT - Readings

    Beginner Freshwater Aquarium
    Ive been using the kit for bout two months now and its really hard to decifer certan readings. For example Nitrite levels greter than 2 and less than 5 ppm all look the same color to me. I test in a well lit area and against a white background but to me the test tube liquid colors dont seem to...
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