Red Sea Seawater Refractometer Fish and for a longer period

and for a longer period of time than other aquarium filtration media available

It does not contain toxic compounds which makes it 100% safe for fish and invertebrates

shape to fit in tight/custom places

magnesium and bi-carbonates

Red Sea Seawater Refractometer Fish and for a longer periodRed Seas Seawater Refractometer offers exceptional accuracy, for measuring the absolute salinity of seawater at a temperature of 25C 77F. 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 15C 59F rather than 25C 77F. Thus, a measurement deviation of up to 1. 5ppt is possible, which can have a