Grodan Gro-Block Improved GR22, Jumbo, 6 x 6 x 4, Case of 64 Nutrient Kits & Accessories This atmosphere oxidizes contaminants in

This atmosphere oxidizes contaminants in the air with friendly oxidizers

Store closed in original packaging at a temperature between 45 ° F and 85 ° F

Growers stand it on the floor or mount it on a wall to break up canopy hotspots and even out temperature

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

Proven Performance: Trusted by the world's top cultivators

Grodan Gro-Block Improved GR22, Jumbo, 6 x 6 x 4, Case of 64 Nutrient Kits & Accessories This atmosphere oxidizes contaminants inGrodan 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