Grodan Gro-Block Improved GR10 Large with Hole, 4" x 4" x 4" (Case of 144) leds Heavy-Duty steel construction with spiral

Heavy-Duty steel construction with spiral fan guards

non-slip handle

Born out of a need for simplicity in application and functionality

Coverage and Flow Rate: This product puts out 11 gallons per minute for a quick

Maximum Height: 7

Grodan Gro-Block Improved GR10 Large with Hole, 4" x 4" x 4" (Case of 144) leds Heavy-Duty steel construction with spiralGrodan Gro Block Improved GR10 Large with Hole, 4" x 4" x 4" Case of 144 New 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. The uniform distribution of water and nutrients throughout the block allows for more efficient use of the entire substrate