Grodan A-OK 50/40 6/15 Cubes, 2" x 2", 30 sheets of 50 cloning-&-seed-starting and is available in 5500K

and is available in 5500K color temperature

UVSpec: 54 μmol/s

Flush your substrate regularly to prevent rest

3 Year warranty

Grodan A-OK 50/40 6/15 Cubes, 2" x 2", 30 sheets of 50 cloning-&-seed-starting and is available in 5500KGrodan 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