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Water Testing

Aquarium Supplies

Water Test Kits

Using test kits to detect problematic water conditions is key to the sustainability of a healthy aquarium. For a fish-only tank, you should measure and monitor pH, alkalinity, ammonia, nitrite, and nitrate levels. In addition to these, you should also monitor the calcium, magnesium and strontium levels in a reef aquarium.

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  1. Hanna Instruments Checker pH Pen

    Hanna Instruments Checker pH Pen

    $37.99

    High accuracy with 0.01 pH resolution Two point fast and accurate calibration Usable with virtually any electrode that shares the same connector 3000 hours of battery life HI 1270 small diameter probe fitseasily in... Learn More
  2. Hanna Instruments Waterproof pH Tester with Replaceable Electrode w/ Accuracy ±0.1 pH

    Hanna Instruments Waterproof pH Tester with Replaceable Electrode w/ Accuracy ±0.1 pH

    Hanna Instruments Waterproof pH Tester with Replaceable Electrode w/ Accuracy ±0.1 pH Reviews

    $84.99

    When HANNA instruments introduced its first version of the pHep (pH electronic paper) in 1986, it immediately revolutionized the standard in pH measurement. pHep`s ease-of-use in combination with its affordability made it possible... Learn More
  3. Hanna Instruments Waterproof pH Tester with Replaceable Electrode w/ Accuracy ±0.1 pH

    Hanna Instruments Waterproof pH Tester with Replaceable Electrode

    Price From: $84.99

    When HANNA instruments introduced its first version of the pHep (pH electronic paper) in 1986, it immediately revolutionized the standard in pH measurement. pHep`s ease-of-use in combination with its affordability made it possible... Learn More
  4. Hanna Instruments Waterproof pH Tester with Replaceable Electrode w/ accuracy ±0.05 pH

    Hanna Instruments Waterproof pH Tester with Replaceable Electrode w/ accuracy ±0.05 pH

    $96.99

    When HANNA instruments introduced its first version of the pHep (pH electronic paper) in 1986, it immediately revolutionized the standard in pH measurement. pHep`s ease-of-use in combination with its affordability made it possible... Learn More

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