Grodan Pro Delta 10 Block, 4" x 4" x 4", case of 144, Commercial ph-ec-tds-meters-and-solutions As with the other ballasts

As with the other ballasts in our SG line

Super light and super versatile

reservoirs

but it will deliver years of solid performance in your grow room

improving plant growth and shelf life

Grodan Pro Delta 10 Block, 4" x 4" x 4", case of 144, Commercial ph-ec-tds-meters-and-solutions As with the other ballastsGrodan 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