When I talked about using pebbles I meant ones bigger than the frog's mouth. My city is so strange to shop in when looking for anything exotic. I can buy some stuff at the reptile store, other stuff at the home improvement store, certain green plants at a plant nursery on the other side of town and by then I've used up a tank of gas. I finally found a bromeliad that can fit in the viv I've been working on for months. The waterfall flows the way I found pleasant but haven't figured out how to deal with the power cord.