First, welcome to the club!
Here's how i'm running my current sump with a Bean Animal overflow design, from the far right, full siphon, emergency drain then the open channel. There is a small Maxijet 1200 in the return section that circulates water for the far left chamber that i tumble chaeto in. The water is then returned to the baffles I suppose this small chamber could also be used for a deep sand bed or maybe a Marinepure block.
I choose to run filter socks because i'd rather clean 4-5 socks then empty all the rock from my sump and siphon out all the built up detritus, my frag tank also drains into this chamber so when the socks are not being used it builds up fast.
The chaeto grows and nothing floods in a power outage, so i'm happy for now but i'm sure there are much better ways to run this that i don't know about yet so hopefully we both learn something from this great community we have here.
Again, welcome to the club and good luck with your system!