to be honest i haven't really though about that, theres only 3 of them and they r fairly small at the moment, maybe in the future but everything seems cool at the moment and ive never had a problem, even when they were in a 55gGreat job. Any thoughts of putting a sump!? the bullheads can be quite the bioload as they get bigger.
No background because the tank is fairly new and that will be coming in an updateReally nice - love the sunfish. Can't get Pumpkinseeds here in UK. I kept some years ago and they were great fish, aggressive feeders. Not a criticism but why no background? It 'd really set the tank off imo.