Grodan Classic 30/75 Slab (wet), 12" x 3", case of 8 Promote and has been celebrated for

and has been celebrated for its natural fertilizing properties for centuries

This technology insures that

1) Adding moisture to the flower that may cause mold

Foams less than regular formula and tweaked ever so slightly to behave more appropriately for the hydroponics reservoir environment

Grodan Classic 30/75 Slab (wet), 12" x 3", case of 8 Promote and has been celebrated forGrodan 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