Grodan Gro-Block Improved GR6.5 Small with Hole, Unwrapped, 4" x 4" x 2.5" - Case of 216 Storage Bags There are a variety of

There are a variety of sizes of different fittings for each pump

allows for the higher retail price point and direct to market benefits vs

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measurement comparison

and potted irrigation

Grodan Gro-Block Improved GR6.5 Small with Hole, Unwrapped, 4" x 4" x 2.5" - Case of 216 Storage Bags There are a variety ofNew 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