If you would change ANYTHING I would change your tank size. The words "Regret" will echo in your head forever ..... PLEASE PLEASE try and make room for a 120. I know you will come to regret it. If you google "Precision Marine: + "Bullet" you will get many articles and info. Euro Reefs are needle skimmers. Very Energy efficient but not very good at "gook" removal when compared to becket skimmers, which is what the bullet is. If you want the best skimming, you want to go with a bullet. For sumps...if you have not read up go to melevs reef and ready. He is the king of sump theory and design.