Grodan Pro A-OK 36/40 6/15 Starter Cubes, 1.5" x 1.5", 30 sheets of 98, Commercial water-pumps-&-irrigation-supplies crafted as a superior pest

crafted as a superior pest management tool

Granulated rockwool can be used alone or as an amendment to organic based mixes

multiple units may be needed

while providing 350 percent more photosynthetic photon flux (PPF)*

Grodan Pro A-OK 36/40 6/15 Starter Cubes, 1.5" x 1.5", 30 sheets of 98, Commercial water-pumps-&-irrigation-supplies crafted as a superior pestGrodan 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 one batch of wool, Grodan is unique by making different types of fibers. The purpose is to support the requirement of the plant in the different plant stages. Grodan has a tremendous capacity for absorbing nutrient solution while retaining plenty of oxygen