Divider Design - Avoiding Flow Rectriction?

[Myka]

I have a powerhead for each side of the tank. I wasn't planning on the return to be the only flow in the tank. I don't like the idea of having dual returns without dual overflows. I think I would achieve better circulation if there is just a single return and overflow rather than dual returns with a single overflow. I'm not sure I want to run dual overflows and dual returns though as it's quite possible the future of this tank may change, and having duals on a 40g tank is kinda silly imo. The main purpose of this tank is NOT to be a reef, but to be a breeding tank for Bangaiis. I'm giving all my SPS away, and will only have LPS in this tank (and only because I already have them lol). I'm sure the flow from a powerhead on each side will be plenty as far as the corals go. I just don't want the one side of the tank to overflow onto the carpet due to restricted flow through the divider or be touchy enough as to clog up and overflow on the carpet. Know what I mean?

I like all these ideas though, keep em coming!!!