Marine Calcium Checker® Hanna Checker

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 Ca2+.

Our portable handheld colorimeter goes where you go.
Achieve your calcium results easily with simple, one-button design.
Quickly get your results without any hassle.
The HI758U-26 are the replacement reagents for the HI758 Marine Calcium Checker® HC. These high-quality reagents are manufactured in our state-of-the-art facility and are clearly marked with the lot number and expiration date on each packet for traceability.

Pre-made reagents for ease of use
Prepared with high purity chemicals
Marked with expiration date and lot number for traceability