D-D Refractometer for Seawater
D-D Refractometer for Seawater is backordered and will ship as soon as it is back in stock.
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A refractometer is a simple and robust way of accurately measuring the salinity within your tank and should be used by every serious marine aquarist.
This refractometer unlike some cheaper alternatives is specifically calibrated and designed for seawater testing so is ideal for your marine tank.
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