Grodan Gro-Block Improved GR10 Large (4x4x4) w/ Hole COCO The submersible pump delivers constant

The submersible pump delivers constant turbulence to your reservoir while the attached Venturi valve naturally draws in air bubbles

Stress Relief: Helps plants recover from various stresses

Turn any couch or table into a comfortable workstation

so you’ll be able to customize it according to your preference

Low residue — MRL exempt

Grodan Gro-Block Improved GR10 Large (4x4x4) w/ Hole COCO The submersible pump delivers constantGrodan Improved GR10 Large 4"x4"x4" Gro Blocks optimized wool structure allows for faster rooting in and nutrient solution replenishment. New and improved wetting agent and hydrophilic technology greatly enhances the water characteristics giving even better water distribution over the height of the block. This results in greater plant development and steerability and more efficient use of water and nutrients. All while the Gro Block Improved maintains