Grodan Pro Delta 6.5 Block, 4" x 4" x 2.5", case of 216, Commercial spl_hrg 000 ET25 12

000 ET25 12

Use with any standard house lamp fixture or normal lamp socket

and no off-gassing to harm plants

It is not a relay or timer that controls photoperiod

Grodan Pro Delta 6.5 Block, 4" x 4" x 2.5", case of 216, Commercial spl_hrg 000 ET25 12Grodan 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