Grodan Gro-Block Improved GR22, Jumbo, 6 x 6 x 4, Case of 64 Nutrient Kits & Accessories Proven Performance: Trusted by the

Proven Performance: Trusted by the world's top cultivators

This atmosphere oxidizes contaminants in the air with friendly oxidizers

The time and money saved from the Quantanium tumbler will be noticed on the first trim

6 GPM Flow: Moves real volume for fast

and the double-ended architecture keeps light degradation lower over time

Grodan Gro-Block Improved GR22, Jumbo, 6 x 6 x 4, Case of 64 Nutrient Kits & Accessories Proven Performance: Trusted by theGrodan Improved Jumbo (White Foil) 6 x 6 x 4 (Case of 64) Keep it Real Real Science Grodan partnered with the Wageningen University and Research facility in The Netherlands and top growers throughout North America to identify the optimal stone wool substrate and irrigation strategies for specialty crops. The result of months of scientific research and trials is Grodan Gro Blocks Improved with our Advanced Wetting Agent. Real Improvement These leading