Grodan IMPROVED Gro-Blocks 4"X4"X4" (GR10) acinfinity Color coded label for easy

Color coded label for easy pH buffer value identification

Calibration: pH: 2 point auto 4

and are small enough to store practically anywhere

Mix with enough water to cover the entire area

Grodan IMPROVED Gro-Blocks 4"X4"X4" (GR10) acinfinity Color coded label for easyGrodan 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