Grodan Delta 6.5 Block, 4" x 4" x 2.5" with holes Nuke em including powdery mildew

including powdery mildew

Ensure it remains in its original packaging and is kept in a cool

Breaks downscale - Keeps irrigation systems in pristine condition

Hanna storage solutions are specially formulated to have an expiration of 5 years from manufacture for an unopened bottle

Designed to run continuously 24/7

Grodan Delta 6.5 Block, 4" x 4" x 2.5" with holes Nuke em including powdery mildewGrodan 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