Grodan Gro-Block Improved GR7.5, 4" x 4" x 3" (Case of 192) dis It delivers superior light quality

It delivers superior light quality and an elevated light output per LED

Is Toluene Polar or Nonpolar

The system delivers an airflow of 240 CFM with a noise level of 32 Dba

Top-Quality Grains

Available in various styles

Grodan Gro-Block Improved GR7.5, 4" x 4" x 3" (Case of 192) dis It delivers superior light qualityGrodan Gro Block Improved GR7. 5 Medium with Hole, 4" x 4" x 3" Case of 192 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