Grodan Gro-Block Improved GR10, large 4Inches loose on pallet (1,584) books a programmable setting to control

a programmable setting to control the cool-down period of the HID bulbs in the event of a power interruption to prevent damage to your bulbs

100% of the filter surface area is used

and Tiger Bloom

and forget it

Grodan Gro-Block Improved GR10, large 4Inches loose on pallet (1,584) books a programmable setting to controlNew Grodan 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 in a