Grodan Delta 10 - 4 in Block 4 in x 4 in x 4 in w/ Hole Water Pumps Aeration & Irrigation Achieve thicker and more rigid

Achieve thicker and more rigid plant cell walls for sturdier plants

Comes with 2 fittings to allow chiller to be plumbed with 1 in hard PVC pipe or 1 in flexible tubing

House & Garden Algen Extract is a premium Norwegian sea kelp blend derived by way of cold-press technology

removing the need for a frame inside

The formulation of surfactants and organic acid detergents will help lift away organic mineral deposits without any odor

Grodan Delta 10 - 4 in Block 4 in x 4 in x 4 in w/ Hole Water Pumps Aeration & Irrigation Achieve thicker and more rigidGro Blocks are similar to a plant container. Need a 3 in pot? Then choose a 3 in Gro Block. Small plants can be fully grown in our larger Gro Blocks. Holes are perfect size for any 1. 5 in starter plug. Come in packs labeled with instructions. Big Mama is Grodan's largest block ever produced! Big enough to grow a large plant for its entire life. More than twice the amount of wool as our Hugo Block.