Guys, thanks so much for the feedback. The water level will be around 3 - 5 inches deep, I was thinking of adding a fresh water snail (have had good results with them) or some small Tetras or Guppies to just clean up any mess in the water (also have had good results with these guys in the past). The water will have a few plants in it, and the land area will have plants as well. My main concern really is the water becoming a bit stale, even though it will be running through a pump, but I think by wrapping it in a filter medium is such a great idea.