Grodan Grow-Cubes, 1 cu ft, case of 6 Hydroponics This CMh 315 ballast is

This CMh 315 ballast is silent

Clean in 5 minutes

improved nutrient and water uptake

and platform to keep your plants automatically watered

Grodan Grow-Cubes, 1 cu ft, case of 6 Hydroponics This CMh 315 ballast isGrodan 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