Hanna Instruments HI758 Marine Calcium Checker

Dial in one of the most critical reef parameters with the Hanna Instruments HI758 Marine Calcium Checker, a precision digital colorimeter designed to deliver fast, accurate calcium readings for saltwater aquariums.

Calcium is essential for coral skeletal growth, coralline algae development, and overall reef stability. The HI758 eliminates the guesswork of traditional titration kits by providing clear, digital results—allowing you to maintain consistent calcium levels and optimize dosing strategies.

Compact, easy to use, and highly reliable, this checker is ideal for reef hobbyists who demand precision and repeatability when managing SPS, LPS, and mixed reef systems.

🧪 Key Features

• Accurate digital calcium testing for reef aquariums
• Eliminates subjective color matching and user error
• Helps maintain stable calcium levels for coral growth
• Compact handheld design for quick and easy testing
• Ideal for SPS, LPS, and mixed reef systems