To start / germ beans in like starter cubes ? Or as an actual medium to fill the entire system with ?

What type of system are we talking about ?

Rockwool stays way too wet in my opinion if used exclusively / by itself as a medium , not to mention crazy p/h issues w/ it even when it's pre soaked prior to use . I like hydroton = kiln fired clay balls = coo-coo puffs . You can wash and reuse them over -n- over too.

We need more info.
Peace
Crispi :stoned: