*Moved to new forum.
If you want to stick w/ Aqua-C, they make an EV series for use in sumps on larger aquariums. I love my Remora, but I have no personal experience w/ the EV series. They make a few models that will work on your tank, depending on how much money you want to spend, room you have, and tank needs. Here is a link to their site showing the EV models- http://www.proteinskimmer.com/productsnew.htm