The stages are more of a marketing hype than anything. All you really need is a good unit that has a sediment filter, carbon block, membrane, and di
cartridge (ie 4 stage). Chloramine specific units generally have a larger carbon block, but I used a standard 4 stage with my tap that used chloramine. Look at the better brands like BRS, Vertex, Spectrapure, Melevsreef, etc. I don't recommend, after using one, the cheaper ebay units like purewaterclub.