My local store (AquaWorld Aquarium) had one of these set up saltwater, very nice. Make sure you have the brushes to get into the tubes though.
How were you planning on attaching wiring? and i would suggest and cirlce of acylis with hole of your choise drilled in, then glue that in or make it snug enough that it will stay. Whatever you do, make sure it is semi-sturdy so the puffurs dont knock it down.
one last thing, i would suggest getting separate water flow into bother sides, either two filters, two outlet pipes, or powerheads.