Grodan

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,...

Grodan Stonewool (rockwool) is made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs. Where other rockwool brand manufacturers cut all sizes from...

Used by the pros to take water samples deep inside a Grodan stonewool block or slab for better pH and EC analysis. Fits any standard Luer-Lock plastic syringe.