A 5 inch Dersa and a 3inch Maxima. I picked both up at Atlanta Aquarium, I feel bad for Rit. After I picked them up I pestered him with 10,00 questions, and then the next time I visited him I noticed there was a new assistant-not saying I had anything to do with that;-).
Most of my reading said that Dersa's could handle mid level lighting- or at least didn't need the highest level, so I tried that first then tried the maxima ( he has on sale for 20 bucks as well ). I like the idea of a critter that supposed to consume nitrates in the tank.