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Hydrometer and Refractometers
Categories > Hydrometer and Refractometers
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| A range of hydrometers and refractometers for marine aquaria |
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| Products |
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| Deltec Refractometer |
 Free Delivery
A refractometer is a simple and robust way of accurately measuring the salinity within your aquarium and should be used by every serious marine aquarist.
The refractometer works on the principle of refraction of light to determine the salinity...
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