Fish 101 Optical Refractometer

Acres Aquatics Verified independent store

→

The Betta Optical Refractometer is a hand-held instrument that has been specifically designed for aquarium use. It measures the salinity and specific gravity of sea water by refrac tive index. It is easy to read, easy to calibrate and features automatic temperature compensation for more accurate readings. It is recommended that you use regularly to monitor your water. Suitable for use in marine aquariums. Show more