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

Ideal for air movement from an air pump to air stones

Its unique formula also allows for outstanding control of powdery mildew found in the garden

Outstanding results controlling powdery mildew

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) 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.