On my 90 gallon tank I have a 20 gallon underneath for the will. However it is all open, no separate compartments, it baffled. I have the overflow from the dt going through a sock, my skimmer is in there, heater and return pump. Also a pump for an algae scrubber I recently built. My question is, Is that an adequate setup or should I look at trying to separate the dump into different areas in the future. Do many people use just an open tank like this for a sump? I can't take it out or get any other one in really without taking the dt off the stand.