Hagen Living Sea Hydrometer
Proper salt content is vital to the health and well being of captive marine species. Large salinity variances can cause stress to delicate organisms. Using this aquarium hydrometer determines the actual specific gravity of marine water aquariums on an ongoing basis. It also includes a thermometer.
- Includes an easy-to-read thermometer
- Ensures all replacement water has the same salinity as the rest of aquarium
- Keeps marine fish happy and healthy