Hanna Marine Magnesium Checker Reagents (25 Tests)

Maintain accurate magnesium levels in your reef aquarium with the Hanna Instruments HI783-25 Marine Magnesium Checker Reagents, a high-quality refill kit designed for use with the Hanna HI783 Magnesium Checker.

These pre-measured reagents are engineered to deliver fast, precise, and repeatable results using Hanna’s digital colorimeter system. By eliminating subjective color matching, they allow reef hobbyists to confidently monitor magnesium—an essential parameter for stabilizing calcium and alkalinity levels and supporting coral growth.

Each kit provides approximately 25 tests and uses a colorimetric reaction to determine magnesium concentration in saltwater aquariums. Individually sealed packets ensure freshness, accuracy, and ease of use for consistent testing routines.

🧪 Key Features

• Designed for Hanna HI783 Marine Magnesium Checker
• Provides approximately 25 accurate magnesium tests per kit
• Pre-measured reagents for consistency and ease of use
• High-purity chemicals ensure reliable, repeatable results
• Supports stable calcium and alkalinity balance
• Individually sealed packets for freshness and accuracy