Marine Magnesium Checker® Hanna Checker

The first Magnesium test of its kind for saltwater aquariums, our Marine Magnesium Checker® HC (HI783) is just what every reef tank owner needs. Struggling with test kits is now a thing of the past. Stop guessing or interpreting a color change by eye. Get a fast, accurate digital read-out every time. 

Perfect for testing and measuring Magnesium levels in saltwater aquariums, reef tanks, and other marine and aquaculture applications.

Easy-to-read, instant digital results
Small, convenient portable size
User-friendly, simple directions and steps
The HI783-25 are the replacement reagents for the Marine Magnesium Checker® HC - HI783. 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.