Grodan Gro-Block Improved GR5.6 Large with Hole, 3" x 3" x 4" (Case of 256) DUCTWORK Lumens per Watt (lw/w) -

Lumens per Watt (lw/w) - 120

we recommend using this filter in conjunction with a 4-inch fan

Includes 8' 100V/240V

The iron in Base A is derived from two superior chelates: Iron EDDHA

but can be costly and inefficient when using bottled CO2 tanks

Grodan Gro-Block Improved GR5.6 Large with Hole, 3" x 3" x 4" (Case of 256) DUCTWORK Lumens per Watt (lw/w) -Grodan Gro Block Improved GR5. 6 Large with Hole, 3" x 3" x 4" (Case of 256) 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 entire