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  • Accuprobe Hydrometer

    Accuprobe Hydrometer

    Wide Range Specific Gravity Meter For Marine Aquarium Use.…
    $11.66
  • AccuraSea Seawater Reference/Calibration Solution [250 mL]

    AccuraSea Seawater Reference/Calibration Solution [250 mL]

    AccuraSea Seawater Reference Solution from Two Little Fishies is the calibration solution of its kind! Made from pure natural sea water, it has been micron filtered, UV sterilized, and then adjusted with reverse osmosis water to the standard S = 35 or conductivity of 53 mS/cm at 25°C(77 =°F). This versatile fluid can be used to check the accuracy of swing-arm hydrometers, calibrate seawater refractometers, or even as a reference for test kits!…
    $14.18
  • Conductivity Calibration Solution - 53.0 mS

    Conductivity Calibration Solution - 53.0 mS

    Used to calibrate your Conductivity/Salinity Probe and PM2 for saltwater salinity monitoring applications.…
    $4.99
  • DD H2Ocean Seawater Refractometer

    DD H2Ocean Seawater Refractometer

    When you need absolutely accurate salinity conditions in your aquarium, you're going to need an H2 Ocean Seawater Refractometer. Unlike other refractometers on the market, the H2 Show Refractometer measures "true" seawater salinity levels, instead of just saltwater. This means that it measures usually unaccounted for elements such as calcium and magnesium as well as sodium chloride, giving highly accurate, precise results.…
    $89.99
  • Deep Six Hydrometer

    Deep Six Hydrometer

    Because of the unique design of the Deep Six Hydrometer, the hobbyist can take a water sample at six inches in depth without submerging their hands in the water, thus avoiding the possibility of contamination. Samples taken at six inches in depth have been proven to give a more accurate salinity reading than surface samples. Every unit is calibrated and tested for accuracy using advanced testing procedures.…
    $12.19
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