6" expert Slab Dimensions: 36" x 3" x 4"

Gro-Slabs provide the final stage for growing a spectacularly large plant. Transplant your Gro-Block plant onto a slab just like professional growers. They come in clearly marked biodegradable UV resistant sleeves for comfortable handling and algae prevention.

•  Expert vertical fibers for faster drainage; best for hobbyists
•  Classic horizontal fibers for slower drainage; best for hot/dry climates

Administrator Note: This is a pic from Aqua Culture's outside hydroponic system. He is growing Japanese cherry tomatoe on one side and Chinese on the other.  The rockwool slabs that he is using has been resused 6 times in two years!