You can see exactly how I set this up in the Sept '09 issue of PFK. It's rewarding to step out of one's comfort zone and try to aquascape without plants for a change. The fish love it too. Biotopes are much easier than most planted set-ups and are relatively inexpensive, so why not consider one yourself...? I'm learning new aquascaping tricks with each biotope and plan to utilise them in a nice planted set-up once my PFK biotope series has been completed. Happy times! Thanks to Wildwoods for supplying the fish and to Peter Kirwan for the wood.