Always get accurate results for your saltwater aquarium with our handheld colorimeter.

Our saltwater calcium colorimeter fills the gap between calcium test kits and advanced instrumentation. Standard test kits have limited accuracy as they depend on the human eye to determine colors. Our handheld colorimeter eliminates the trouble of matching to a color chart by providing a direct saltwater calcium result in ppm CaCO₃.

• Our portable handheld colorimeter goes where you go.
• Achieve your calcium results easily with a simple, one-button design.
• Quickly get your results without any hassle.

The HI758U Checker® HC (Handheld Colorimeter) provides a simple, accurate, and cost-effective way to measure calcium. Required for the development of calcium carbonate skeletons of coral reefs, calcium is a crucial component of marine waters. Designed as a more accurate alternative to chemical test kits, the HI758U provides quick, accurate results in a few easy steps.