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Chitosan is derived from chitin which is found in the exoskeletons of shellfish such as shrimp
One bolt fixing ensures quick and trouble free fitting
The essential oils are organically sourced from plants throughout the world
● Excellent carbon source for beneficial mycorrhizae and bacteria
Back Draft Shutter 315mm (12") Shipping Chitosan is derived from chitinWhen your extraction system is turned off a back draft shutter is the perfect way to stop air escaping from your room. It will also prevent unwanted cold hot air from coming back into the grow room when it is not wanted. A Back draft shutter is a cylinder shaped piece of equipment with 2 centrally mounted flaps. The air produced by your duct fan will cause these flaps to open, however when the duct fan is turned off the flaps will shut meaning no air
