Instant Ocean Hydrometer
Instant Ocean Hydrometer Accurate, reliable water test equipment is absolutely vital to creating and sustaining a healthy, successful marine environment. Easy to read and simple to operate, the Instant Ocean Hydrometer delivers precise full-range salinity and specific gravity readings -- accurate to + 0.001 -- and does it each time, every time. Full Range.
*Its is however important to replace you Hydrometer over time to ensure accrete readings