nope. rockwool is just one way to go. It is a media with its own set of particulars like any other media or you can go medialess as in bubble systems.
Prodaytrader Reviewed by Prodaytrader on . Are woolcubes required? I am transfering my plant from mg soil , to DIY hydrobubble system. My question is Do I really need to use woolcubes if my plant has a big stem already and is over 2 months into veg? I seen a youtube video of a guy not using it. But from what I read in the forums people use them, Are they REQUIRED? Rating: 5