AlphaPhase
Well-Known Member
Yeah, the fire retardant stuff you wouldn't want in the plant root zone I'd imagine. I'm not sure if all industrial Rockwool has it but I know all Rockwool is made the same. It's all going to make you itch regardless of horticulture grade or industrial grade because it is spun with metal (I'm pretty sure) and regular insulation is spun with glass. Horticulture Rockwool makes me itch just as bad as fiberglass, it's nasty stuff. But if there's such a thing as non treated Rockwool, I'm sure it's the exact same as horticulture grade, I'm guessing the only difference is the fire retardant on most industrial grade stuff.
I'm not sure about it repelling water, but that's a good thing if it does, for hydro, you don't want it soaking water up like a sponge or you're plant will die.
I'm not sure about it repelling water, but that's a good thing if it does, for hydro, you don't want it soaking water up like a sponge or you're plant will die.