Grodan Gro-Block Media Strips Size:3 in. x 3 in. x 4 in. - 8/strip Exclusively compatible with all Aspects

Exclusively compatible with all Aspects 2-3/4 inch diameter quick-clean tubular feeders

Use in residential home gardens

Check out this helpful video from Miracle LED

there will be no chemicals

Grodan Gro-Block Media Strips Size:3 in. x 3 in. x 4 in. - 8/strip Exclusively compatible with all AspectsGrodan 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