Grodan Improved Gro-Slab - (36x6x4") (Case of 12) Disc Filters so no adapters needed

so no adapters needed

and having everything in one

and supplements

so most operations run a single pack per container

Grodan Improved Gro-Slab - (36x6x4") (Case of 12) Disc Filters so no adapters neededGrodan 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