Grodan IMPROVED Gro-Blocks 8"X8"X4" Uni-Block (GR40) filter and FloraBlend is ideal for

and FloraBlend is ideal for the task

and minerals

Its porous nature allows it to suck up and hold onto moisture

maximum amperage 0

Grodan IMPROVED Gro-Blocks 8"X8"X4" Uni-Block (GR40) filter and FloraBlend is ideal 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