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specific gravity

  1. Best Salinity Meters of 2023

    Best Salinity Meters of 2023

    Best Selling Refractometer BRS Refractometer   The tried and true analog refractometer has long been the preferred salinity-measuring device for saltwater aquarists. It's...
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  2. How to Calibrate & Use the Hanna Instruments Marine Salinity Tester

    How to Calibrate & Use the Hanna Instruments Marine Salinity Tester

    Hanna's Salinity Tester has got to be the easiest way to measure salinity in your saltwater aquarium.
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  3. What Is Salinity & The Best Way to Test Your Saltwater Tank?

    What Is Salinity & The Best Way to Test Your Saltwater Tank?

    We all know seawater contains salt, along with a variety of other elements. In order to keep your fish healthy, you need to maintain a precise amount of salt in the water which we measure using...
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  4. BRStv Product Spotlight - Tropic Marin Floating Hydrometer

    Instant and Accurate Results for Checking Aquarium Salinity? Tropic Marin High Precision Hydrometer

    Get quick, accurate salinity or specific gravity measurements at a glance using this glass floating hydrometer.
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  5. Salinity Meter: Calibration and How to Care for One

    Salinity Meter: Calibration and How to Care for One

    Hanna Instruments Salinity Tester (HI98319), Apex Salinity Probe / Lab Grade Conductivity Probe and IceCap Salinity/Temperature Digital Pocket Tester In a previous article we explained how to use a...
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  6. 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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  7. You're Using The Wrong Test Kit: Why Aqua Medic's Marine Lab Is Better Than ICP For Many Hobbyists

    You're Using The Wrong Test Kit: Why Aqua Medic's Marine Lab Is Better Than ICP For Many Hobbyists

    Mail-in water testing is becoming the future of monitoring both major, minor and trace elements in our reef tanks alongside some of the critical parameters we utilize to gauge the health of our...
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