Active Air Pre-Filter, 12"x39" Grow Light Cords & Socket Sets and contributes to the movement

and contributes to the movement of phytopathogenic microorganisms present in soils due to their high proliferation rate

herbicides and other pesticides in water based solutions and emulsions

to the "FAN" position

Electrodes can become dirty from use and will produce inaccurate results even as they read correctly in a pH buffer

plants grown with Top-Max have a sweet

Active Air Pre-Filter, 12"x39" Grow Light Cords & Socket Sets and contributes to the movementMake the most out of your Active Air filter with a corresponding Active Air pre filter. Find the matching size from our large collection! Why choose Active Air filters? All filters are maintenance free and feature long lasting activated virgin charcoal that keeps your air odor free. Inside each filter, the charcoal is carefully packed to ensure consistent and even air flow throughout the carbon bed for full use of the filter. Stock up on pre filters