Grodan Gro Block Improved GR4 Small 3" No Hole 3" x 3" x 2.6" Strip Reflectors & Grow Lights Duct Size: 6” | Dimensions:

Duct Size: 6” | Dimensions: 7

Handy for direct pH testing of soils or pH soil solutions

industrial grade units capable of pulling 190 pints per day in optimum environments (see specifications)

Digital display features a clock

6" diameter by 20" long accommodates most lamp types up to 1000W

Grodan Gro Block Improved GR4 Small 3" No Hole 3" x 3" x 2.6" Strip Reflectors & Grow Lights Duct Size: 6” | Dimensions:New 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