Grodan Gro Block Improved GR4 Small 3" No Hole 3" x 3" x 2.6" Strip flowering nutrients Easy to use monitor that

Easy to use monitor that measures pH

• Approved for organic gardening

Pentane is a highly non-polar

• Sealed

The SPH-1 hub uses a single RJ12 cable input jack

Grodan Gro Block Improved GR4 Small 3" No Hole 3" x 3" x 2.6" Strip flowering nutrients Easy to use monitor thatNew 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