Heres a pic.IM just gonna copy and paste what I said in this other thread lol.
I have a 180 & I used a 75-100 gallon like outdoor pond thing I got for free. I just loaded it with like 100 something pot scrubbers, Pond Matrix & a few large rocks. Also have a heater in there with a couple circulation pumps. Totally open no dividers or anything. Works great. I love that I went sump because its literally a totally open concept. You can do anything you want as long as its practical obviously Have fun with it