Grodan Pro Gro-Block Improved GR4 with Hole, 3" x 3" x 2.5" (Case of 384) PH/EC/TDS Meters and Solutions The product also includes two

The product also includes two machine washable pre-filter cloths to prevent carbon residue and two rope clip hangers to suspend the extra-large carbon filter above ground

Sensi Cal Mag Xtra® is specially designed for use with diverse hydroponic growing media and all continuous liquid-feed growing systems such as aeroponics

*We do not recommend using well water as source for our RO systems

Texas Controller Dimensions: 2'W x 2'L x 3'6"H

Grodan Pro Gro-Block Improved GR4 with Hole, 3" x 3" x 2.5" (Case of 384) PH/EC/TDS Meters and Solutions The product also includes twoGrodan Pro Gro Block Improved GR4 Small with Hole, Unwrapped, 3" x 3" x 2. 5" (Case of 384) New and improved stone wool substrate with advanced wetting technology from Grodan Introducing Grodan Gro Blocks Improved, a product specifically engineered to deliver real results for your crops, developed by plant scientists, researchers, and top growers. The uniform distribution of water and nutrients throughout the block allows for more efficient use of the