GRODAN Mini Blocks 45 Pack 1.5"x1.5" Rockwool Stonewool Cubes
Grodan Stonewool-Rockwool 1.5"x1.5"x1.5" Grow Blocks - 45pk Stonewool / Rockwool is recognized the world over as the ideal hydroponics growing substrate. Grodan stonewool is known for its quality, consistency and performance.