MARS HYDRO 4 INCH INLINE DUCT FAN AND CARBON FILTER COMBO WITH SPEED CONTROLLER Air Purification The desiccant packs reduce RH

The desiccant packs reduce RH down to 50% but won't absorb below that level

sound-absorbing heavy gauge steel casing

Roots Organics Soilless coco mix is specifically engineered to allow you to feed heavier for greater yields

a self-contained

Calcium and magnesium are two of the macro elements that are significant to plants' growth and development

MARS HYDRO 4 INCH INLINE DUCT FAN AND CARBON FILTER COMBO WITH SPEED CONTROLLER Air Purification The desiccant packs reduce RHWith a 4'' inline fan rated for 205CFM, an activated carbon filter with Australian charcoal, and a knob controller applied to allow easy switching and adjustment of the fan speed, the Mars Hydro 4 inch inline duct fan and carbon filter combo offers you everything you need to set up the ventilation in a grow tent. A good ventilation setup for grow tents measuring up to 3x3 feet. Package Includes: 4" Inline Duct Fan with a knob Speed Controller, 4"