What do you mean by "maintenance free" filters, what type of filter is that?
To remove H2S gas and iron, you need to oxidize them and then remove the oxides created by the oxidation; IOWs clarify the water by removing the discoloration it causes.
You must kill all types of reducing bacteria, you can not filter them. You use a disinfctent to do that and all disinfectants will also oxidize the H2S and iron etc..
Gary Slusser
22 yrs in water treatment and well pumps, 13 yrs helping people on the 'net to help themselves.
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