They max out at around 6 inches. They spawn in caves, and sometimes dig pit around the caves. Spawns can reach 200-400 eggs. The pair bond is usually strong.
Since they come from faster moving water, they might not mind if you use a powerhead in the lower regions to create a current, but I wouldn't think this is a neccessity. Feed them a more carnivorous based diet. They can be aggressive toward both their own species and other species, especially in the lower half of the aquarium. Their swim bladders are small, so they will tend to hang out around the bottom a lot.
Post pics if you get some, we don't see them here on MFK every day.