Aquarium Systems Marine Gravity & Salinity Hydrometer
Aquarium Systems Instant Ocean Marine Gravity & Salinity Hydrometer
Instant Ocean Hydrometers new improved design delivers precise full-range salinity and specific gravity readings - accurate to 0.001 - every time.
Easy-fill convenience keeps hands dry when filling. It has a durable, permanent needle mount and easy-read 2-color scale with safe zone and an extra-wide stabilizer base.
Easy to read and simple to operate
Salt salinity tester
Reliable water test
Accurate & reliable to 0.001