Precision glass hydrometer for marine aquariums.
Easily measure the salinity of your aquarium with this glass hydrometer featuring a measuring tube. Simply fill the container halfway with seawater, immerse the clean hydrometer, and read the density after one minute. Equipped with an integrated thermometer and correction scale, it allows precise adjustment according to water temperature (calibrated at 25 °C). Ideal for reliable salinity monitoring in marine aquariums.