Yes there are alot of benefits to a sump. Added water volume for one, easier to top off or do water changes, add chemicals if necessary, put a fuge in, added filtration if desired, put things like cheato in, will give you a stable water level in you're DT, put other equipment in so as not seen in the DT. I have in mine ,my DIY skimmer pump, heater and auto top off and so far loving it! Plus it was pretty cheap,some plumbing, a pump, someone gave me (ty tim) an OF, and a rubbermaid container.