After looking through several pages and (maybe I missed it) not seeing general reactor media questions since 2013 I'd like to pose this. What medias are you using, and how are you using them, in what combinations. ie; Reactors, Bags of media in a sump, ect. Currently I have a Phosban 150 and am seeing now that activated carbon is probably not the best idea. So what to incorporate and how to do it is the question, but first I want to know what is working for everyone else, AND what's good and NEW!