Grodan Pro A-OK 36/40 6/15 Starter Cubes, 1.5" x 1.5", 30 sheets of 98, Commercial grow-light-ballasts UL and cUL listed

UL and cUL listed

5′ x 5′ – Fits 4′ x 4′ tray

Replacement Screen 150 Micron

yet still provides the same superb “compost-tea extract” that boosts plant nutrient uptake during all the stages of your plant’s life cycle

• Renovation

Grodan Pro A-OK 36/40 6/15 Starter Cubes, 1.5" x 1.5", 30 sheets of 98, Commercial grow-light-ballasts UL and cUL listedGrodan 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