Hanna Instruments
Hanna Instruments HI-98107 pH Tester
Model: HI-98107
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Pros
- •Durable and reliable, with some users reporting previous models lasting over 10 years of regular use
- •Significantly more reliable than cheaper pH testing alternatives
- •Easier to calibrate compared to competing brands
- •Comes pralibrated out of the box, requiring minimal calibration for freshwater aquarium use
- •Delivers accurate pH readings when properly maintained and verified against included buffer packets
- •Includes helpful accessories like storage solution and buffer packets
- •Useriendly with clear instructions and simple maintenance routine
- •Excellent value for the price, especially for professional soil laboratory work
Cons
- •Does not stay in calibration reliably between uses
- •Has given false readings that resulted in significant problems (including loss of fish)
- •Only worked reliably for 2 weeks before calibration issues began in some cases
Bottom Line
The Hanna Instruments HI-98107 is a mixed bag that really depends on your specific needs and usage patterns. While some users report excellent durability and reliable performance for freshwater aquarium testing with minimal calibration needs, others have experienced serious calibration drift and false readings that caused real consequences. If you're considering this for aquarium use, know that it appears to perform best when you verify it against the included 7.0 buffer before each use—but be prepared that this might not be a one-and-done calibration. For professional soil laboratory work, reviewers found it more reliable, but for casual aquarium keepers, you may want to factor in the ongoing maintenance requirement and consider whether a pH meter with better calibration stability might be worth the investment.
What Reviewers Are Saying
Praised
easy to use31%
accurate readings15%
dependable performance8%
good for beginners8%
holds up well8%
Criticized
calibration required23%
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