The carbon block cartridges/filters preceding the RO membrane take care of the chlorine so you don't need to treat the filtered water any further except for your salt and any other dosing requirements of your system. I see now that suppliers are offering 'special' chloramine filters for RO systems as well. The thing to do is determine what your water utility uses to treat the tap water, chlorine or chloramine, then ensure you have the appropriate pre filter to take care of it. Probably not a bad idea to get a chlorine test kit from your local pool/spa supplier, but I think if you change your carbon chlorine guzzler at the recommended interval, you should be ok.
If I'm not mistaken, chlorine/chloramine will destroy your RO membrane, so you want to ensure the pre filters are in good shape.
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