Not to mention it has PH fluctuations issues more then other growing mediums.@greenunion you are absolutely right! Rockwool is not a great growing medium, it is both hazardous and not biodegradable.
I have been using "Flexiplugs" (this is a coir or peat product that is bound together with a polymer) for a while and although they are not as biodegradable as regular peat or coir products, they give you the benefits of both being solid and breaking down by plant roots, but in the same time not polluting the environment and causing more balanced PH.
Awesome job on the setup, thanks for sharing :)
Thanks! Just spreading truth! Nice to have someone agree!