Sea Hydrometer Salinity Meter Specific Gravity Test for Aquarium Fish Tank Water Marine Sea Saltwater

Received damaged unit. Had to fix it by my own and its temporary working temporary

Do not buy this..Better add some money and buy refractometer

Tested my saltwater and it provided a result as accurate as the refractometer! This is astonishing. If they're both right, then I would definitely recommend this instrument.

Specific gravity is SPOT on!!

Great

A little hard to read

This one works as well as the Instant Ocean one. It’s hardly rocket science.