Thanks for the suggestions! I was under the assumption that erythrogaster were more terrestrial as well. They just moved into their new cage last night and if they have feeding or nose-rubbing problems I will probably go with a semiaquatic setup like you suggested. As for the rhombifer, they are real secretive and have fed on both frozen shiners and live Rosey Reds. I feed them in deli cups and I've never seen them actually in the act of eating. They've each eaten two good sized meals in my care and have already put on some girth and grown at least an inch! Good luck with yours.