Grodan Improved Gro-Slab - (36x6x4") (Case of 12) SUBSCRIBABLE Your package includes the Knockbox

Your package includes the Knockbox Base

which clears only about 60 to 80 percent

Quiet Fiberglass Housing: Cuts whine and vibration for discreet setups

Growonix GX600 Deluxe Reverse Osmosis System for 1200 GPD

Adjustable side panels: Pull the pattern in from a wall

Grodan Improved Gro-Slab - (36x6x4") (Case of 12) SUBSCRIBABLE Your package includes the KnockboxGrodan Improved Gro Slab (36x6x4") (Case of 12) Experience the pinnacle of cultivation technology with the Grodan Improved Gro Slab (36x6x4"). This state of the art slab has been meticulously designed, keeping in mind the intricate needs of both hobbyist and professional growers. Grodan's Unique Stonewool Composition: Unlike conventional rockwool brands that derive all sizes from a single wool batch, Grodan stands apart. We produce different fiber