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Salinity

Specific gravity is the measure of relative salinity or the amount of dissolved salts in your aquarium water in comparison to pure water. Being reef aquarists you all be aware of the importance of maintain a constant specific gravity in order not to stress the inhabitants of your aquarium. Measuring specific gravity on a regular basis is essential to keep up the idyllic environment for your aquatic inhabitants. It is important that you never ignore this fact even if sometimes you might think it is not as important compared to the other factors that need to be taken care of in a reef tank.

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  • HI98319 Salinity & Temperature Tester - Hanna

    HI98319 Salinity & Temperature Tester - Hanna

    Hanna Instruments

    $79.99
    We are pleased to announce our NEW HI98319 waterproof salinity and temperature tester! Waterproof and floats! Includes 4x of the Salinity Calibration Fluid Packets. Automatic Calibration – A 35.00 ppt solution is used for calibration and...
  • Salinity Refractometer - Generic

    Salinity Refractometer - Generic

    All Misc Brands

    $29.95
    It is designed for testing the concentration of salt water and brine and used for quality control in research and clinical laboratories and marine industry. Its scale provides a direct reading of the specific gravity and concentration (part per Thousand)...
  • 35ppt (1.026sg) Refractometer Calibration Solution (1.25 oz) - Fritz

    35ppt (1.026sg) Refractometer Calibration Solution (1.25 oz) - Fritz

    Fritz Aquatics

    $6.39
    Pre-measured refractometer calibration solution takes the guesswork out of properly calibrating your instrument - with no need for expensive or unreliable measuring equipment. A refractometer is essential to the saltwater hobbyist for success. Maintain...
  • Seawater Refractometer - Red Sea

    Seawater Refractometer - Red Sea

    Red Sea

    $74.99
    Main features of Red Sea’s Seawater Refractometer include:Directly reads the absolutesalinity ofseawaterat25°C/77 0F ( No need for seawater or temperature compensation factors)Specifically designed for the ionic content of seawater (NSW) for...
  • Refractometer Calibration Standard (60 ml) - Brightwell

    Refractometer Calibration Standard (60 ml) - Brightwell

    Brightwell Aquatics

    $5.04
    Refractometer & Hydrometer Calibration Standard 1.0264 Specific Gravity 1.3394 Refractive Index 35 ppt Salinity 53 uS/cm at 25 deg c Overview Brightwell Aquatics Aquarium Reagents Refractometer & Hydrometer Calibration Standard is...
  • ATC Seawater Refractometer - DD Aquarium Solutions

    ATC Seawater Refractometer - DD Aquarium Solutions

    All Misc Brands

    $54.99
    Almost all, if not all, of the refractometers currently available to the aquarium hobby are designed for measuring saltwater (sodium chloride or brine solution) and not true ‘seawater’. Although seawater is mostly sodium chloride it also...
  • PINPOINT® AC Adapter Kit 110 VAC - American Marine

    PINPOINT® AC Adapter Kit 110 VAC - American Marine

    American Marine

    $11.95
    PINPOINT® AC Adapter Kit (available in 110 VAC of 220 VAC) is optional to replace the 9-volt battery, which some monitor owners find convenient when monitoring full time. This AC Kit now contains special electronic filtering to avoid electrical...
  • FOWLR Beginner Saltwater Test Set (Refractometer, Salifert NO3, PO4)

    FOWLR Beginner Saltwater Test Set (Refractometer, Salifert NO3, PO4)

    Salifert

    $65.99
    Generic Refractometer - It is designed for testing the concentration of salt water and brine and used for quality control in research and clinical laboratories and marine industry. Its scale provides a direct reading of the specific gravity and...