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Hydrometers Measure The Salinity In Marine & Reef Aquariums.

Marine Aquarium Hydrometers are designed to measure the specific gravity (salt content or salinity) of the water in your marine or reef aquarium tank. The Hydrometer will have been calibrated to take this measurement at a given temperature, normally about 25C.

The salinity of your aquarium will change over time as water evaporates so it is important to regularly check the water with a marine hydrometer to keep the salinity within an acceptable range.

  • SALE
    Kent Marine Hydrometer Image

    Kent Marine Hydrometer

    Kent Marine Aquarium Hydrometer accurately measures the salinity and specific gravity of marine water. The Hydrometer will ensure you create perfect water salinity for marine fish and corals Accurate between 20 - 29°C  Easy to use - clearly...

    £10.49 £7.50
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  • Tetra Marine Comfort Hydrometer

    Tetra Marine Comfort Hydrometer

    Tetra Marine Comfort Hydrometer  Accurately measures salinity and specific gravity in marine aquarium water.Tetra Marine Hydrometer is accurate between 20 - 29°CEasy to use Marine HydrometerThe Tetra Marine Hydrometer has a clearly marked safe...

    £14.49 £10.25
    Out of stock