I don't understand the question 100% are you looking at having a fish only setup if you don't need to grow coral?
If so it is still advised to have coral rock in the tank to give the fish some where to sleep and feed off.
There are different systems to choose from for the sump to give Biological media eg: zeovit, deepsand beds, nitrate reactors etc
I personal have a very clean sump run with filter socks, skimmer, po4 reactor and the zeovit system.