Grodan Gro-Block Improved GR10, Tall (White Foil), 4 x 4 x 4, 1584 Blocks Loose on Pallet Molds + Fungicides Clear pre-filter housings: See when

Clear pre-filter housings: See when filters load

which is kinder to stems but lets the canopy sag as it fills

Synchronized outlets: Exhaust and CO2 outlets swap so the two never run against each other

No Leak Ducting Ports

healthy respiration

Grodan Gro-Block Improved GR10, Tall (White Foil), 4 x 4 x 4, 1584 Blocks Loose on Pallet Molds + Fungicides Clear pre-filter housings: See whenNote: This bulk item is shipped as a full pallet without boxes or retail labeling. Grodan Improved GR10 (White Foil) 4 x 4 x 4 (1584 blocks Loose on Pallet) 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