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Real Science
you should start to see mycelium growing on the grain
Saves money
And in addition it’s been optimized specifically for Coco Coir growers
AC Infinity Galvanized Steel Backdraft Damper Ducting Insert Connector Size:4 in Real ScienceAn antidraft duct insert designed for use with range hoods, bathroom fans and other home HVAC applications. Features outer rubber gaskets that create an airtight seal and grip between the damper and ducts. Mounts horizontally or vertically to prevent backflow and debris from entering ducting. Galvanized steel body with spring loaded aluminum damper blades that open with minimal airflow. Available in 4", 6", & 8" A ventilation ducting tool designed for
