Grodan Delta 4 Block 3 in x 3 in x 2.5 in w/ Hole (48/Cs) Protect your Dosatron Nutrient Delivery

Protect your Dosatron Nutrient Delivery System with all the necessary accessories for a successful installation

Outstanding results controlling powdery mildew

This soil is amended with organic ingredients including bat guano

Ideal for air movement from an air pump to air stones

Your biological go-to insecticide

Grodan Delta 4 Block 3 in x 3 in x 2.5 in w/ Hole (48/Cs) Protect your Dosatron Nutrient DeliveryGro 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.