VANTAKOOL Digital PH Meter, 0.01 PH High Accuracy Pocket Size PH Meter / PH Tester with 0-14.0 Measuring Range, Water Quality Tester for Household Drinking Water, Swimming Pools, Aquariums

I know it’s cheap but do yourself a favor and buy a decent one. Your plants and animals depend on the proper Ph and this thing could really cost you.

Great product I haven't had any issues within the last year of using this. This product works better then most expensive ph testers! Get one you won't regret it! I compare it with another ph test solution and it's always accurate

I have used this alongside my expensive bluelab pH meter for many months now and it has consistently shown to be just as accurate. Will be interesting to see if this little gem retains its accuracy over the next year.

Excellent - That describes the company behind the product. When I had problems with my purchase they rectified it by sending out a new meter. No questions asked. The meter itself is a great buy and the replacement works flawlessly. I so wish other companies I deal with would work as smoothly as this one. I highly recommend

After one use, batteries died and seller would not replace. After buying replacement batteries tried to recalibrate several times and ERR flashed every time. Extremely frustrating

Doesnot callibrate to NIST pH buffer solutions of 4, 7, and 10. Does not manually calibrate.

The unit calibrated perfectly and provided one accurate reading. Less than thirty minutes later, the unit would no longer provide the same reading. It would not recalibrate and prompted ERR each time we tried to recalibrate. I've printed my mailing slip and will be returning.

Seems to be working just fine