Thanks! I hadn't planned on any filter/water movement because I had a betta that didn't like any movement at all, but it turned out he was sick and died just last week. Since it will no longer be his tank I may end up adding something, but I wanted to see how it goes without it.
I'm actually glad you responded. I checked out your goldfish tank journal because I have fancies as well. I just moved them outside for the summer, but I'd like to set up a planted tank to move them back into in the fall. Yours looks really nice, and I'm glad to see that you've been successful mixing dirt and goldfish.