A hanging style would not work for me, as we have cats who would not think twice about eating Jovi for an afternoon snack. My only option would be to replace the compact flourescent with a fish-specific lamp.
I just read that they need to have companionship from other ottos...but i only have a 3 gallon tank. Is this enough for 2 or more of them? It seems to be cycled quite well, but i would rather not push it. What if i got another couple snails, or a larger shrimp?