Review on VIVOSUN Digital PH Meter Tester Pen - High Accuracy 0.01 Water Quality 🌿 Tester with 0-14 PH Measurement Range for Household Drinking, Pool, Aquarium - ATC, Army Green by Meghan Brown
Couldn't calibrate well with 4.01 and 7.0 common hydro calibration solution
If you use calibration solution, overall this is a good pen for its function. I'm not sure if all or just mine. But "mine" didn't like the general hydroponic calibration solution. 4.01 or 7.0 will be a little less and sometimes more. The solution that came with it worked great.
- Ideal for a small house
- Can be damaged
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