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and controls the air pump with 3 pre-programmed settings
Since you can't return custom sized air filters
It is designed to provide both knockdown and residual control in the growing area
To use Hydrofarm's CO2 Flow Rate Calculator
Also works as a superbly effective weeding tool
16x16x2 Pleated Air Filters MERV 14 Plus Carbon 3 Pack AC / Dehumidification / Humidification and controls the air pumpNordic Pure 16x16x2 MERV 14 Plus Carbon air filters are made of electrostatically charged synthetic materials with an added flat panel infused with activated charcoal that attracts and capture most airborne particulates in your home. It will help eliminate unwanted odors as well as trap most airborne dust and particulate matter for fresh, clean air. Odorous gases and vapors (VOC) are attracted to and held by the activated carbon material while