Grodan Gro-Block Improved GR6.5 Small with Hole, 4" x 4" x 2.5" - Case of 216 Select Rockwool Type:GR32 Hugo w/ Hole 6"x6"x6" - Pallet of 512 Under Current 4-Site Expansion Kit

Under Current 4-Site Expansion Kit for Under Current Double Barrel XL13 or Under Current XL13

it may include chlorine

The 110 cup shredder allows for grinding plant matter to the perfect consistency in a short amount of time

These Carbon filters are specifically designed for the control of VOCs (Volatile Organic Compunds)

The 84mm pre-rolled cone will be shorter and fatter than the standard cone and will be available in both bleached and unbleached varieties

Grodan Gro-Block Improved GR6.5 Small with Hole, 4" x 4" x 2.5" - Case of 216 Select Rockwool Type:GR32 Hugo w/ Hole 6"x6"x6" - Pallet of 512 Under Current 4-Site Expansion KitNew and improved stone wool substrate with advanced wetting technology from Grodan Introducing Grodan Gro Blocks Improved, a product specifically engineered to deliver real results for your crops, developed by plant scientists, researchers, and top growers. A core component of the "Precision Growing" philosophy, Grodan Gro Blocks Improved with Advanced Wetting Technology allow you to cultivate more uniform and high quality crops while using less water