TMC Hydrometer

What It Is

The TMC Hydrometer is a simple and reliable swing-arm hydrometer designed to measure the specific gravity of marine aquarium water. Quick to use and requiring no batteries or calibration solutions, it provides an easy way to monitor salinity as part of your regular aquarium maintenance.

Why We Like It

Maintaining a stable salinity is one of the foundations of a healthy marine aquarium. Whether you're mixing fresh saltwater or checking your display aquarium, a hydrometer provides a fast and straightforward way to monitor specific gravity.

While a refractometer offers greater precision, a swing-arm hydrometer remains an excellent budget-friendly option for routine use and is ideal for beginners starting their first marine aquarium. Used correctly and kept clean, it provides a quick and dependable indication of your aquarium's salinity.

Key Details

• Measures marine aquarium specific gravity
• Simple swing-arm design
• Quick and easy to use
• No batteries or calibration required
• Ideal for mixing new saltwater and routine salinity checks
• Excellent entry-level salinity tester
• Suitable for marine aquariums