DigiGrow: Advanced Digital Tester for Enhancing Aquatic Environments in Aquariums and Hydroponics Review

I have only used this product 3 times in the last 6 months to measure the pH of pool water. There was a serious problem today when the meter gave an incorrect reading of the buffer solution used to calibrate the meter. The gauge has drifted for the past week as a range of pH readings trended lower. I tested with standard buffer solution. The meter cannot display the pH value of the buffer. I bought this pH meter 8 months ago, can I return it?

The pH pen in this kit is junk. At first it got stuck reading all zeros. After playing around with it for a while it seems to be behaving normally, I did the calibration at 4.01 and 6.86. Then I tested some distilled water and the meter read 8.0 at first, after 1 minute it read 6.5 and after about 2 minutes it read 6. I bought another one of those yellow pH pens and after the same calibrations it gave the reading just jumped out. Everywhere, everywhere, everywhere. The TDS test pen appears to…

Both worked fine until I calibrated the pH meter a week or two - I used the solution I had on hand and calibrated at 2 points, 7 and 4 - had to I am using the bags provided because the difference between the pH 7 solution I used and the pH 6.86 powder solution provided seems to be larger and an integer higher than just 0.14 - Human Error? Probably maybe, but I also have, brand new from first use, 200+ ppm as my tank corona, a pH temp gauge for continuous monitoring, which is a dot, on a TDS…