Red Sea Seawater Salinity Refractometer DEF and then place the acrylic

and then place the acrylic block on top and you are on your way

Exclusive easy to replace cartridge stainless steel pH and ORP Electrode

00              REST OF THE WORLD: $15

This unit is especially necessary when testing high sugar items Jellies

The design allows the user to easily wipe off the sample

Red Sea Seawater Salinity Refractometer DEF and then place the acrylicRed Sea Seawater Refractometer Product #: RED R12018 REFURBISHED and have A FULL 3 YEAR WARRANTY! Red Seas Seawater Refractometer offers exceptional accuracy, for measuring the absolute salinity of seawater at a temperature of 25oC 77 0F. Most refractometers used within the aquarium hobby are not specifically designed for reef aquariums and use an algorithm for the measurement of brine (NaCl rather than seawater) and at a temperature of 15oC 59 0F