It's been a couple months, how are they doing now?
I have the marbled ones.. my thought is that w the two bulbs maybe a tall overhanging plant would help, or throw some hornwort that floats on top.. they like a shady spot in my tank. Also I think if all the other fish are peaceful to them, they don't feel as limited to only the top of the tank. Mine definitely eat from the surface but mostly hang out 2-4 inches below the surface. here's a pic of mine~
