Do I have to follow the calibration setup on the app with a brand new unit, one video says they’re already calibrated.
Maybe this will help
I would as I had to calibrate one of them and mine was brand new too. Also FWIW, my ph probe needed recalibrating after only 3 months in my one grow.
Same here! Mine were new and had to calibrate them as well.
Great question! Yes, all new Gen 2 units require calibration upon setup. I personally calibrate monthly and check the cleanliness of both probes each week during my drain/fill.