TMC Refractometer

What It Is

The TMC Refractometer is a precision optical instrument designed to accurately measure the salinity and specific gravity of marine aquarium water. It provides a fast, reliable reading, helping you maintain one of the most important water parameters in a healthy marine aquarium.

Why We Like It

Salinity is one of the few parameters that every marine aquarium depends on, from fish-only systems through to demanding SPS reefs. Even small changes can affect livestock, making accurate measurement essential.

Compared to a swing-arm hydrometer, a refractometer offers significantly greater accuracy and consistency, making it our preferred choice for routine aquarium maintenance. Once calibrated, it provides quick and dependable readings whether you're mixing new saltwater, checking your display aquarium or monitoring evaporation.

Key Details

• Accurately measures salinity and specific gravity
• Ideal for marine and reef aquariums
• More accurate than a swing-arm hydrometer
• Suitable for mixing new saltwater and routine salinity checks
• Easy to calibrate and use
• Provides quick, reliable readings
• Supplied in a protective storage case