Grodan Delta 4 Block 3 in x 3 in x 2.5 in w/ Hole (48/Cs) Ideal for air movement from

Ideal for air movement from an air pump to air stones

The Intake Duct Kit allows duct work to be attached to the intake on the Quest 506 Dehumidifier

Outstanding results controlling powdery mildew

anytime to measure critical parameters related to nutrient uptake in plants

Successful calibration indicator is displayed on screen for 30 days to indicate when re-calibration is required

Grodan Delta 4 Block 3 in x 3 in x 2.5 in w/ Hole (48/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.