Drop That Sound
Well-Known Member
I would always stick the probe of a digi temp controller into the middle of the cup of coco or an extra dummy rock wool or riot plug or whatever medium I was rooting all the cuttings in that's the same size. Use that one plug to control the heat mat and all the other plugs, knowing they be the same temp. Now I mostly AL though, so I'll probably be using LEDs or heat wires at some point too, and just hang the probe in its own layer next to the plant somewhere, so I know the rest are about the same.. Or wrap the inflated bags full of solution with the strips if I decide to continue using DWC or aero methods to hydro layer my clones, especially in the cold months.