Some embodiments of the invention include a filter for a waste tank, the filter including a housing with a pair of end fittings an inner tube positioned within the housing, the inner tube having perforated walls and a negatively charged resin positioned between the housing and the inner tube. The first end fitting may be configured to attach to the tanks vent line, and the second end fitting may be configured to attach to external venting tubes such that fumes from the waste tank are configured to flow from the waste tank, through the inner tube of the filter, and away from the waste tank.
