Still working out exactly what components to add. I have never had a sump before, so I still have a lot of figuring to do. I am thinking about a mag 16 for the sump return, reef octopus xp 3000 e for a skimmer, a closed loop running around 2000 gph (haven't picked a pump yet). I haven't looked at the circulation pumps for the display tank yet. I still have to build a canopy for 3 250 watt metal halides and some other lights ( again haven't decided on vho or t5's). I have a 30 gallon top off tank. I haven't looked at chillers yet, but I am sure I will need one. Of course if anyone has any suggestions, I am all ears. My last tank was quite a few years ago, no sump and only 55 gallons. I am a little out of my element and very open to suggestions and experiences.