If you have IRB or sulfate reducing bacteria problems, no filter will work. You have to kill the bacteria and you can't use a UV light to do it. I use an inline chlorine pellet chlorinator and special mixing tank system that works very well. You;d follow that with a special carbon in a backwashed filter to remove the taste and smell of the chlorine and any dirt the chlorination caused. I suggest the latest revised and greatly improved version of the Fleck line of control valves; the Clack WS-1 to be specific. It's the best choice for a DIYer that wants to repair their equipment instead of calling a dealer for service.