Grodan Gro-Block Improved GR32, Hugo, 6 x 6 x 6, Case of 64 Silicas High Flow membrane: Every 6

High Flow membrane: Every 6 months to 2 years dependent of use and input water quality

55% RH Setpoint: The drier of the two storage tiers

Our 5 Gallon

3-Year Manufacturer's Warranty: GreenBroz stands behind the G Lite Grinder with a robust warranty

Cation Exchange Enhancer for Vigorous Vegetative Growth

Grodan Gro-Block Improved GR32, Hugo, 6 x 6 x 6, Case of 64 Silicas High Flow membrane: Every 6Grodan Improved Hugo (White Foil) 6 x 6 x 5. 8 (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