What kind of filter did you get? I was thinking of this one:
The DJ-50 -- I've had the mini too and it's too small to be of any good, IMO
I wasn't too impressed with the Hagen Stingray either.
You could also use a sponge filter, and get a gang valve to control the flow. The only drawback is that it would take up a lot of space on the bottom of a small tank.