Neutra-Safe condensate neutralizer recharge kits are available for all sizes of Neutra-Safe condensate neutralizers. All Tube style recharge kits include a spare O-ring, if needed. The Neutra pH media is a proprietary mix of calcite and magnesium oxide for optimal performance. Professional service technicians should inspect and recharge Neutra-Safe condensate neutralizers on an annual basis at minimum. All Neutra-Safe condensate neutralizers can now be refilled quickly and efficiently with Neutra-Safe’s unique sack recharge kit. You asked, we listened! Neutra pH media comes in a special fabric sack in all units and recharge kits making installation and recharging a snap!