Grodan Gro-Block Improved GR32 Hugo with Hole, 6" x 6" x 6" - Case of 64 Select Rockwool Type:GR5.6 Large w/ Hole, 3" x 3" x 4" - Case of 256 It contains hydrogen

It contains hydrogen

Exceptionally low power consumption from just 2W

Perfect to use with fans

repelling effect or evaporation

Setting up and activating the ExHale Original CO2 Bag couldn't be easier

Grodan Gro-Block Improved GR32 Hugo with Hole, 6" x 6" x 6" - Case of 64 Select Rockwool Type:GR5.6 Large w/ Hole, 3" x 3" x 4" - Case of 256 It contains hydrogenNew 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