Hears what I do with rockwool
@Old ST1R
I buy the long RW batt and cut 1x1x3" chunks off, think it's 3". Cheep.
Use a small nail or something clean to poke a hole 75% through, the long way.
Take a liter of RO and add 1ml 35% H202 PH to 5.8-6ish
Soak the RW till it sinks. This is way too wet as is. So take the wife's salad spinner and spin all the water out. Note, If she may kill you, go to the dollar store and pick up a dedicated RW spinner LOL
I then cut a couple inches off an alow plant and dip the cutting end in the allow. Rooting hormone would work hear too or nothing.
Poke your cut into the hole in the RW, then water with a squezzy pipet 2-4mills of the same water. Put under heated dome 80F and monitor the weight of the RW every couple days and add water to each as needed.
Also get a tube of chlorex wipes and clean your hands well before taking cuts and before any time touching the RW. I pretty much have 100%.