Grodan Pro MM 40/40 6/15 Plugs, 1.5" x 1.5" x 1.5", 2250 per box, Commercial spl_hrg Reduces watering and leaching of

Reduces watering and leaching of nutrients

They are baked in an open furnace using high grade clean fuels

Precisely balanced for vibration-free operation and longer life expectancy

a naturally occurring biocide

Grodan Pro MM 40/40 6/15 Plugs, 1.5" x 1.5" x 1.5", 2250 per box, Commercial spl_hrg Reduces watering and leaching ofGrodan 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