Grodan Gro Block Improved GR4 Small 3" No Hole 3" x 3" x 2.6" Strip Reflectors & Grow Lights Handy for direct pH testing

Handy for direct pH testing of soils or pH soil solutions

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

The FloraFlex Air Bleed Valve (3/4'') can be installed on any mainline to prevent air locks

CenturionPro 3HP Switch Box

Grodan Gro Block Improved GR4 Small 3" No Hole 3" x 3" x 2.6" Strip Reflectors & Grow Lights Handy for direct pH testingNew 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