never thought about that, but it sounds like a good idea. If you able to ensure that it will stay there go for it and make sure you post pics when its done. I would be very interested in seeing the results
I guess that answers my question. No light shines below the shelf.herb said:Once upon a time i decided to make a shellie condo, i used plastic shelving units and painted them black, then put sand all over them, the shellies took up the lower shelves first, then as the colony grey they took over the second floor too. attached is a crude photo of the setup.
this is a 75 gallon tank, and these are multi's.