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natural seawater

  1. How to use a Refractometer to Measure Salinity

    How to use a Refractometer to Measure Salinity

    In the early days of the hobby, we’d use a floating glass hydrometer to measure the specific gravity in our tanks and when mixing up saltwater. The strength of the seawater determines how high...
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  2. Mail-In and ICP Aquarium Water Testing: Which Service is Right for You?

    Mail-In and ICP Aquarium Water Testing: Which Service is Right for You?

    - Original Article: https://mdshop.us/TestingTestKits Many hobbyists admit they do not test their aquarium water parameters often enough. The advent of mail-in water testing for home aquaria makes...
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