For my outside one? No, actually. Its very densely planted though. I have some of this pond-weed type plant that I got from Home Depot ( i don't know its proper name) as well as some water lillies, an Iris, and duck weed and water lettuce at the surface. I do partial water changes every week, and top up evaporated water every other day or so.
I didn't really expect them to live very long in this set up, but I had no room indoors, so sticking them in my tub garden was supposed to be a temporary solution till I found something better. But they're thriving in there, so I guess I'll leave them there till they're ready to go to the LFS. As the temparature warms up though, I think I may get a small fountain, like maybe one of those frog-spitting-water things to increase the oxygenation.