Grodan Pro Delta 4 Block, 3" x 3" x 2.5" with hole, case of 384, Commercial commercial-greenhouse-fixtures 5 pounds are sold individually

5 pounds are sold individually

Easy to store in reclosable bag

Water resistant

There's no waste water

Flow (gpd): Pumps 60

Grodan Pro Delta 4 Block, 3" x 3" x 2.5" with hole, case of 384, Commercial commercial-greenhouse-fixtures 5 pounds are sold individuallyGrodan 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