Refractometers & Hydrometers
Use the Dymax Glass Hydrometer to measure the density of salt within your aquarium.
Offers exceptional accuracy, for measuring the absolute salinity of seawater at a temperature of 25oC/77 0F.
Temperature compensating refractometer with LED illuminated scale for salinity determination
Use the Aqua One Glass Hydrometer to measure the density of salt within your aquarium.
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