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Randee Pugsley
Reviewed in the United States on June 14, 2024
The accuracy,easy of use and storage is why this works for me..
Michael
Reviewed in the United States on March 21, 2024
I do not dislike anything about this product is my first time using this product with a blue lab pH pen I’ve got to say it’s worth the money both these are 16.9 fl oz. This will probably last me the next 12 months.
Michael Hansen
Reviewed in the United States on December 11, 2024
Both bottles state to use up within 3 months of opening. If you’re only calibrating one pen per month this won’t happen. What is the impact on calibration accuracy after 1 or 2 years with these solutions?
MJ
Reviewed in the United States on October 25, 2024
I followed the directions to the letter and the calibration solutions worked perfectly. I feel so much better about my grow knowing the reading I am getting are true readings. The solution hand my Blue Labs OnePen with perfectly calibrated and fast results
Mouse
Reviewed in the United States on January 14, 2024
Not Much To Say. It's accurate! No Complaints Here!
Robert from Alaska
Reviewed in the United States on July 21, 2023
I own the blue lab ph pen and EC meter, and these solutions are perfect for calibration of the pH pen. I bought large bottles, still working super well a year later, probably have enough to last me another 3 years of regular monthly calibration checks/calibrations. Between the nice test pen and these solutions my hydroponic results have improved. Good stuff.
preston
Reviewed in the United States on March 13, 2023
Works perfect for recalibration of blue lab ph pen. What else could you ask for?
Daniel Wyand
Reviewed in the United States on February 15, 2023
Bit pricy for just some calibration solution but it works as advertised.
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