Thanks! Good suggestions and ideas...I will probably get a 5 gallon jug and cut a hole in the top part - fashion some kind of wooden cover for it that will conceal a light. For the heating and filtering I think I know of a way to play with the natural plumbing in the stand so that I can get water out of the bottle - no problem because it was designed to do that but can also get water back into the bottom as well. I am hoping I can get a glass 5 gallon bottle to help with clarity so that the fish will be easier to see. Plastic bottles have a bit more distortion. Actually...a couple of small tetras might be good - would not be noticeable at first and as people are filling their cup and looking at the bottle they would suddenly notice the fish....heheheheh