AC Infinity | Activated Carbon Refill | 1200+ IAV Australian Charcoal, 16 lb.

The 16 lb bag of AC Infinity refill carbon: RC412 Australian virgin charcoal, 1200+ IAV, in granules sized to fill a refillable filter without compressing it.

That is enough for one refill of an 8" refillable filter, two of a 6", or four of a 4". It is only for filters designed to be opened and refilled.

Tip: swap the carbon when you start smelling the grow outside the tent; that is the practical sign the bed is spent.