Nugg
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I still use rockwool I'm my rcdwc systems,have for yrs and still will...I just figured out how to use it in my system..I simply just keep it dry after seed roots out..I run it about a inch from top net pot.use my scrog for support....ok..I use 2" ridged foam cut to fit down in net pot about a inch...I cut 1" square hole in center of foam..that's where the rockwool goes..I use just enough hydration pebbles to fill the remaining space under the foam to stop water getting to rockwool...