Grodan Delta 6.5 - 4 in Block 4 in x 4 in x 2.5 in w/ Hole (36/Cs) Ideal for air movement from

Ideal for air movement from an air pump to air stones

peat-based growing medium with high drainage capacity

Quickly check multiple plants and automatically sends and stores all your key plant statistics in the Pulse Mobile App available free Google Play store for Android (search “Pulse”)

It is adjustable from 20%–80% RH humidity with positive On and Off settings

Grodan Delta 6.5 - 4 in Block 4 in x 4 in x 2.5 in w/ Hole (36/Cs) Ideal for air movement fromGro 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.