Hagen® Hydrometer C/F Scale

Temperature and specific gravity in one tool.

The Hagen Living Sea Hydrometer with Thermometer is important for maintaining proper living conditions for your fish. The use of the hydrometer provides an accurate and convenient method of checking the specific gravity of aquarium water and to ensure all replacement water has the same salinity as your aquarium. Maintaining proper water temperature with the thermometer will help to ensure your fish are comfortable in their aquarium.