I've been thinking about doing something like this too. I have a new 55 I just setup a couple days ago I bought for my three bichirs (senegals). It's a barebottom setup with a black background and a black bottom... I've been thinking REAL hard whether I want to do a CYBR style bichir tank (which i'm leaning towards), being strictly bichirs and overstocked, or if I want to do a nice, clean bare bottom predator tank. I have plenty of time to decide, but I am curious to hear some of the answers to this aswell.