Grodan Gro-Block Improved Select Rockwool Type:GR4 Small w/ Hole, 3" x 3" x 2.5" - Case of 384 We've done our best to

We've done our best to provide all the learning resources you may require in our Learning Center on how to properly install your Covert Carbon Filter

190 Micron

clamps and centering rings set ($219 value) included

and amino acids

Grodan Gro-Block Improved Select Rockwool Type:GR4 Small w/ Hole, 3" x 3" x 2.5" - Case of 384 We've done our best toNew 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