Grodan Gro Block Improved GR4 Small 3" No Hole 3" x 3" x 2.6" Strip Reflectors & Grow Lights Used in conjunction with Humboldt

Used in conjunction with Humboldt Nutrients powerful additives we assure that your yields and quality will increase so dramatically

TSL Horti Tech and Grower’s Choice have joined forces with their

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

Handy for direct pH testing of soils or pH soil solutions

If those limits are exceeded

Grodan Gro Block Improved GR4 Small 3" No Hole 3" x 3" x 2.6" Strip Reflectors & Grow Lights Used in conjunction with HumboldtNew 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