Air Box Jr. Pre-Filter Refill pH Up Clay pebbles at the bottom

Clay pebbles at the bottom of the pot can also be used as additional drainage if required to a level of 1"

Curing takes 24 hours

or flowers

With adjustable air venting screens and multiple duct ports

The choice between this and the 4000cc comes down to one number: how much air is left once the product is in

Air Box Jr. Pre-Filter Refill pH Up Clay pebbles at the bottomSpecial Order Note: Returns for Air Boxes not used are 14 days from the time of delivery. There is a 30% restocking fee and must pay for return shipping. This is the Air Box manufacturers return policy. Don't let unwanted air pollutens get in your grow room with this versatile Air box jr. From the maker of the original Air box, it eliminates 98% of all insects, molds, mildews, spores, pollen, dust, dander and other airborne particles down to 0. 3