Hanna Alkalinity Checker Reagent | HI755-26 | HI772-26| Hanna Instruments

Hanna HI755-26 / HI772-26 Alkalinity Checker Reagent

The Hanna HI755-26 / HI772-26 Alkalinity Checker Reagent is the official replacement reagent for the Hanna Instruments Marine Alkalinity Checkers. Designed for fast, accurate, and repeatable alkalinity testing, this reagent allows you to perform up to 25 tests while maintaining the precision reef aquarists depend on.

Compatible with both the HI755 Marine Alkalinity Checker (ppm CaCO₃) and the HI772 Marine Alkalinity Checker (dKH), these pre-measured reagents eliminate guesswork and ensure consistent test results. Manufactured using high-purity chemicals and marked with lot numbers and expiration dates for traceability, they're the trusted choice for hobbyists, coral farmers, and professional aquarium service companies.

Key Benefits

• Official Hanna Instruments replacement reagent

• Compatible with both HI755 and HI772 Alkalinity Checkers

• Performs up to 25 alkalinity tests

• Pre-measured reagents for fast, accurate testing

• High-purity chemicals for dependable results

• Lot numbered and expiration dated for quality assurance

• Ideal for reef aquariums and marine systems

Why Test Alkalinity?

Alkalinity is one of the most important water parameters in a reef aquarium. Stable alkalinity supports healthy coral growth, calcification, and pH stability. Regular testing helps reef keepers identify changes before they affect sensitive corals and other invertebrates.

Routine alkalinity monitoring can help:

• Promote healthy SPS and LPS coral growth

• Maintain stable pH

• Fine-tune dosing schedules

• Prevent parameter swings

• Improve long-term reef stability

Fast & Accurate Testing

The HI755-26 / HI772-26 reagents use Hanna's proven colorimetric testing method. Simply zero your checker, add the reagent, mix the sample, and insert the cuvette for a digital alkalinity reading in seconds. The HI755 displays results in ppm CaCO₃, while the HI772 displays results in dKH.

Product Features

• Official Hanna Instruments reagent

• 25-test refill pack

• Compatible with HI755 and HI772 Marine Alkalinity Checkers

• Colorimetric testing method

• High-purity, pre-measured reagents

• Designed for marine and reef aquariums

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