$100 military discount
Air Filters are used to oxidize dissolved iron or sulfur gas (rotten-egg smell) out of the water. As the water is forced through the air, the oxygen in the air oxides the iron/sulfur into a state that can be filtered out and trapped in the media. The unit will backwash (or clean itself) every 2-3 days or as needed based on your water conditions/water usage.
Only maintenance needed is an annual check and then replacing the media once it fails (5-10 years in most installations)
Water Softener - water without iron