You could use it as a filter if you want, easily hide a underwater pump and have hoses going out say underneath a rock or something to hide them partly.
I saw them at home depot, they did not look as real as mine that I got made from a different company, plus mine is two tone and home depot rock was one tone.
Have you put it in yet? I'd love to see some pics. If its hollow, you should definitely drill at least on hole in it, so fish can get in there. Otherwise its just wasted space.
