Review on Hydroponics Measurement 🌿 with TekSky Digital Meters by John Vann

Inaccurate reading or stabilization. I contacted the seller through Amazon and waited for a response. it is not calibrated as the instructions show, just random numbers from samples with known pH values. I hope they send a new one that works. unfortunately there is no way to catch up. Addendum: Received a replacement delivery, which was also defective. worse than the original. I then received a refund as they would not replace a second defective item. very frustrating. I'm not sure if all items are scrap or if shipping is difficult for them. I reluctantly have to give a one star rating.