In the early days of the hobby, we’d use a floating glass hydrometer to measure the specific gravity in our tanks and when mixing up saltwater. The strength of the seawater determines how high the...
Best Selling Refractometer
BRS Refractometer
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The tried and true analog refractometer has long been the preferred salinity-measuring device for saltwater aquarists. It's accurate, affordable,...
Hanna Instruments Salinity Tester (HI98319), Apex Salinity Probe / Lab Grade Conductivity Probe and IceCap Salinity/Temperature Digital Pocket Tester
In a previous article we explained how to use a...
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