I need to find a skimmer that will work on a 600 gal tank with around 100gal sump. Only one hitch, it cannot be over 31in high in total. I am having a very hard time finding one, anyone have any ideas?

The tank will house 2 small sharks an eel and sting ray. A few corals will be housed in the tank. So it will have a fair amound of bio load.

Any ideas will be great, the tank is already up and running, so before you say "raise the tank a little bit". I would if I could. There is also not alot of room in the sump area, so I might have to get 2 smaller skimmers in place of one monster skimmer.