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Rainmaker 18 Volt Lithium Ion Battery Aeration Air Stones Multi Functional: This ventilation combo removes Multi Functional: This ventilation combo removes heat and eliminate the undesirable ill smelling odors in the grow tent to solves air delivery problems without major system rework or expense The sensor comes factory calibrated for precise CO2 readings and utilizes low voltage technology to avoid Radio Frequency Interference (RFI) from electronic ballasts
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