[QUOTE="SICC";2189409]no roccwool man, the drip system keeps the medium wet, roccwool absorbs the water too much for the AG drip system, even in DWC you put the roccwool on top of the hydroton pellets, so the bubbles cant get to it[/QUOTE]
How could a sponge be less absorbant than a rockwool cube. The rockwool is not as dense as an AG sponge.