I built up layers of thick slate, interspersed to make a sort of wall with lots of spaces across the back, and my duboisi loved it. I very small gravel substrate is good for these guys, too.
I alternated spirulina, bloodworms, frozen peas, and a good omnivore flake food (when juvenille) or cichlid pellets (when adults) and had a really good colony going after a while.
Make sure you have a lot of filtration going, and these guys also don't mind a fairly brisk water flow.
The most frustrating thing with these guys is waiting for them to get that wonderful adult coloration, but it's definitely worth the wait!