Active Air Pre-Filter, 10"x39" Full Spectrum LED Grow Lights In thorough tests conducted by

In thorough tests conducted by the Humboldt Nutrients team throughout the hills and valleys of Northern California this specific solution of Ca and Mg dominated the competition in side-by-side trials

(206 kg) Weight when full: 686 lbs

absorption and utilisation of nutrients

Waterproof and tear-resistant

Measures 22"L x 20"W x 7"H

Active Air Pre-Filter, 10"x39" Full Spectrum LED Grow Lights In thorough tests conducted byMake 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