Made from molten rock spun into cotton candy-like fibers and then compressed into cubes, blocks, or slabs
Has a tremendous capacity for absorbing nutrient solution while retaining plenty of oxygen...
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.