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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 w…

    $14.18
  • Biocube Mini Hydrometer

    Biocube Mini Hydrometer

    The Oceanic Biocube Mini Hydrometer can remain submerged inside the aquarium for continuous monitoring of salt levels.…

    $19.03
  • 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 me…

    $90.99
  • 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 conta…

    $12.19
  • Instant Ocean Hydrometer

    Instant Ocean Hydrometer

    Marineland's Instant Ocean Hydrometer delivers precise full-range salinity and specific gravity readings that are accurate to +/- 0.001 and does it each time, every time. Thanks to the new improved de…

    $13.88
  • New Item
    Vertex™ Refractometer

    Vertex™ Refractometer

    Maintaining a stable salinity is one of the most important aspects of reef tank husbandry. Gone are the days when the serious hobbyist relied on Hydrometers to keep tabs on this crucial parameter. The…

    $51.95
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