A buddy of mine just walked into my apt with a bag of Volcano rocks for my DWC system. I was planning on using the regular round rocks I see in most grows (I can't remember there name, sorry)
Since the volcano rocks are porous, wont it allow for mold to grow inside of them? Or have some people grown with them, and they were fine?
Since the volcano rocks are porous, wont it allow for mold to grow inside of them? Or have some people grown with them, and they were fine?