Good choice on the Aquaclear. Consider running a foam bubble filter as well. Either soak the foam in Dr. Tims/Bio Spira or let it soak in your sump for at least 2 weeks. I leave one in my sump all the time so one is ready as needed. And then also a small powerhead aimed up at the surface like the Hydor 240. That's my standard QT setup for aeration.
I would also run a powerhead. It may not be necessary but it cant hurt. I also always add an airstone right under the powerhead. Airstones dont do a ton for oxygenation, but when I run the bubbles through the powerhead it must help at least a bit! I certainly makes me feel better