Grodan Gro-Block Improved GR10 Large with Hole, 4" x 4" x 4" - Case of 144 Grow Lights Maximum Devices Controlled: 4

Maximum Devices Controlled: 4

or no cord

The Mars Hydro 2

Sodium Carbonate Peroxyhydrate

and are using a 2 or 3-part base nutrient

Grodan Gro-Block Improved GR10 Large with Hole, 4" x 4" x 4" - Case of 144 Grow Lights Maximum Devices Controlled: 4New 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