Big sump or wet dry. Water changes are really important. I'm running a 100g sump with 20l pond matrix and a bunch of ceramic I just keep adding a little at a time. I keep 2 big sponge filters also incase anything ever happened to my sump. I have a 5500 gph pump, and have been thinking of adding a very large canister also for mech. I average over 300g per week in water changes which I think are probably one if not the most important part