Review on 🌊 Water Quality Test Kit: 3-in-1 pH EC Temperature Meter with ATC, Probe, Waterproof & Black-Light – Ideal for Aquariums, Hydroponics, Pool Spa, Lab, and Drinking Water by Shaun Bushey

I repeat my previous review. This meter cannot be calibrated. I can observe the pH change when it's in the calibration solution. Revane tells me it cannot be returned as I have had it for a month now. This too is unacceptable. A small selection of calibration packages might not have been a good start. I AM A CHEMIST AND THIS IS NOT A RELIABLE DEVICE. I was only convinced of this after purchasing reliable calibration chemicals. I only had one month from the order date to return the unit, minus the shipping time. It is difficult to get to so many closed shops due to the Covid pandemic. I am asking Teckoplus to replace this and remove this review. I'm also not happy that Revane isn't helping.