Now accepting brilliant ideas!!

[Aquattro]

For partitioning my sump. It's 5ft long, 2ft tall, and 18" wide. I'll want to use a filter bag for input, my Euroreef sits in there somewhere, a float valve for auto-topoff and a heater. And I guess a small power head to feed the reactor.
I've always done various baffles with chambers, but this is a clean tank, never baffled ,so I'm wondering if someone has better ideas than me (no cheap shots on that, k? ) Thanks