Are airpumps absolutely necessary in any tank? Especially if you've got live plants in there, it shouldn't be required if the filter is returning the water with any surface disturbance at all, would it? I run an AquaClear 200, and it doesn't disturb the water much at all; the ripple doesn't even reach the other side of my 38-gal tank. Don't seem to need an airstone.
Just as an aside: This is another time when doing that "Tank Specs" post would really help. So many posts I've seen lately can't be addressed without some kind of additional information on the tank. If the tank-spec links were there in the poster's signature (as suggested by the new, first post on the board), it would save time and effort because the question could be answered right away, after viewing the tank specs involved. We should do that, you guys!
-- Pat