Refractometers & Hydrometers
Offers exceptional accuracy, for measuring the absolute salinity of seawater at a temperature of 25oC/77 0F.
Price: WAS $129.50NOW $107.93
In seconds, this digital refractometer can test your salinity in ppt (part per thousand) and also reads salt levels as a percentage. Also measures temperature.
Use the Aqua One Glass Hydrometer to measure the density of salt within your aquarium.
Hand held instrument for the measurement of the true Salinity and Specific Gravity (S.G.) of sea water by refractive index.
A refractometer measures the salinity levels in your marine or freshwater aquarium.
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