Digital Water Testing for a Thriving Aquarium: Hanna Checker Colorimeters
Maintaining stable water chemistry is one of the most critical aspects of a healthy aquarium—especially in reef systems, where even small fluctuations can impact coral growth and coloration. Hanna Checker Colorimeters replace guesswork and color charts with precise digital readings, helping you dial in parameters for healthier livestock, faster coral growth, and fewer problems.
Benefits of Using Hanna Checker Colorimeters
- Accuracy & Consistency: Digital readings eliminate interpretation errors common with color charts.
- Affordable & Practical: Only pay for the tests you need. No bulky lab equipment required.
- Easy to Use: Simple one-button operation encourages regular testing and maintenance.
- Early Detection: Catch problems early with precise monitoring of key parameters.
- Broad Range: Available for both saltwater and freshwater aquariums.
Saltwater / Marine Checkers
- HI772 – Alkalinity Checker (dKH)
- HI755 - Alkalinity Checker (ppm)
- HI780 – Marine pH Checker
- HI781 – Marine Nitrate Low Range Checker
- HI782 - Marine Nitrate High Range Checker
- HI764 – Nitrite Ultra Low Range Checker
- HI758 – Marine Calcium Checker
HI783 - Marine Magnesium Checker - HI702 – High Range Copper Checker
- HI736 – Phosphorus ULR (Phosphate) Checker
- HI774 - Phosphate ULR Checker
- HI721 – Iron Checker HC
- HI784 - Ammonia Checker
Freshwater Checkers
- HI700 – Freshwater Ammonia (Low Range)
- HI775 – Freshwater Alkalinity Checker
Multiparameter & Photometer Kits
Final Tips for Reef Success
- Test regularly to keep parameters stable.
- Record test results to identify trends over time.
- Use single-parameter checkers for routine checks and multiparameter photometers for comprehensive testing.
Switching to Hanna Checkers means greater confidence in your tank’s chemistry and less stress for your fish and corals. With simple operation, reliable accuracy, and models tailored for every key parameter, they’re a valuable upgrade for any aquarist.
Top 5 Hanna Checker Colorimater Frequently Asked Questions
1. Are They Worth It?
Most reef tank owners would agree that Hanna Checker Colorimeters are well worth the cost because they are easier to use and more reliable than traditional aquarium water test kits ...when it comes to select parameters.
Not ALL the Hanna Checkers are created equal in that some are much harder to use than others. This is referring specifically to the Calcium and Low Range Nitrate test kits which have a more involved testing procedure that negates the "easy to use" part of the equation. We would only suggest hobbyists choose the Calcium and Nitrate LR Checkers over an analog-style kit if you have trouble with color charts or performing titration procedures accurately.
2. What Hanna Checkers Do I Need?
We recommend the use of the Alkalinity dKH, High-Range Nitrate, and Ultra-Low Range Phosphate because they use a single reagent and you can get your results in under 2 minutes. When used correctly they are one of the most accurate, consistent, and reliable ways to monitor dKH, nitrates, and phosphates in your home aquarium.
3. Are The Hanna Checkers Accurate?
Yes, they are accurate and precise when the test is performed correctly and consistently. They also have a small window of expected variance and great resolution for the particular parameter your testing.
4. How Do You Wash The Vials?
Just rinse the vial very thoroughly in RO/DI water, shake out any excess water, and let them dry completely before using them again.
5. How Do You Get All of the Powdered Reagent Out of the Packet?
This is a pretty common question because it is important that you use the appropriate amount of reagent. With that in mind, a very small amount of reagent leftover in the packet should not cause a problem because Hanna Instruments does account for this when filling the reagents; any variance in your results will be well within the expected accuracy window if any variance occurs at all.
- Grab the packet by the corner, and shake it a few times so the powder collects together inside the packet.
- Using a pair of scissors, cut along the dotted line on the packet.
- Push the corners together to open the packet and create a funnel.
- Crease the funnel so you can easily pour the reagent into the vial without spilling it.
With over 25 years of experience keeping aquariums of all kinds, Robert has a detailed understanding of advanced aquarium techniques and theory. Working as a professional content creator in the saltwater aquarium industry for over 18 years, his perspective, thoughtfulness for the hobbyist, and a general understanding of the hobby, and industry that surrounds it, allows Robert to write and create digestible content that makes reefing fun and easy.
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