I have the same sump for my new tank build, and will be using the media cups just like JoJosReef.If only there were space and honestly I think I’m over particulate filtration.
Now thats something! I wouldn’t want to have carbon in all the time but that is a great solution for when needed. Perhaps some rubble would be a good alternate…
Two cups will hold a bag of chemi pure elite, the third cup will hold rubble or matrix
Middle section will be a skimmer, live rock, and an algae scrubber.