Grodan 4x4x2.5" Rockwool Grow Block Improved Anden Safe for hydroponic systems and

Safe for hydroponic systems and media while plants are growing

For use indoors

High-Tech vapor control

Lamp Features:

Recommended Tank Size: 110 Gallons

Grodan 4x4x2.5" Rockwool Grow Block Improved Anden Safe for hydroponic systems andNew Grodan 4x4x2. 5" Block Improved! Improved product at current pricing. New density + new hydrophilic technology = better water distribution and root development. The uniform distribution of water and nutrients throughout the block allows for more efficient use of the entire substrate volume Full saturation of the blocks with no dry spots and improved EC control with less water is achieved in the rootzone due to the uniform, optimized wool resulting