The Hanna Marine Alkalinity Checker HC (HI772) makes testing alkalinity in your saltwater aquarium easier, faster and more accurate. Designed specifically for marine and reef aquariums, this digital handheld colorimeter provides precise alkalinity readings directly in dKH, eliminating the guesswork of traditional colour-matching test kits.
Alkalinity is one of the most important water parameters to monitor in a reef aquarium. It plays a vital role in maintaining stable pH levels and providing the carbonate required for healthy coral skeletal growth. The Hanna HI772 allows you to monitor your alkalinity with confidence, helping you maintain consistent water chemistry and a thriving reef environment.
Key Features
-
Digital Alkalinity Testing – Displays alkalinity readings directly in dKH, removing the need to interpret colour charts.
-
Designed for Marine Aquariums – Perfect for saltwater aquariums, reef tanks and coral systems.
-
Accurate Measurements – Measures alkalinity between 0.0 and 20.0 dKH with a resolution of 0.1 dKH.
-
Simple One-Button Operation – Straightforward testing suitable for beginners and experienced reef keepers.
-
Supports Coral Health – Helps you monitor carbonate hardness, an essential parameter for coral growth and pH stability.
-
Compact & Portable – Lightweight handheld design makes regular aquarium maintenance convenient.
-
25 Tests Included – Supplied with alkalinity reagents for 25 tests, allowing you to start testing straight away.
-
Replaceable Reagents – Compatible with Hanna HI772-26 Marine Alkalinity Reagents.
Technical Specifications
-
Model: HI772
-
Testing Parameter: Marine Alkalinity (dKH)
-
Measurement Range: 0.0–20.0 dKH
-
Resolution: 0.1 dKH
-
Accuracy: ±0.3 dKH ±5% of reading at 25°C
-
Testing Method: Colorimetric
-
Light Source: LED at 610 nm
-
Battery: 1 × AAA (included)
-
Automatic Shut-Off: After 10 minutes of inactivity
What's Included?
-
Hanna HI772 Marine Alkalinity Checker HC
-
Alkalinity reagents for 25 tests
-
2 glass cuvettes with caps
-
1 mL syringe with tip
-
1 AAA battery
-
Instruction manual and quick-start guide
Why Is Alkalinity Important in a Reef Aquarium?
Maintaining stable alkalinity is essential for successful reef keeping. Corals consume alkalinity as they grow and build their calcium carbonate skeletons, meaning levels can gradually decrease over time.
Regular testing allows you to identify changes early and make appropriate adjustments to your dosing routine. Consistency is particularly important in reef aquariums containing demanding stony corals such as SPS and LPS.
Why Choose Hanna?
The Hanna HI772 is an excellent investment for reef keepers looking to take control of their aquarium's water chemistry. Rather than relying on subjective colour comparisons, you get a clear digital reading that makes tracking alkalinity levels simple and convenient.
