Needs more Geos imo haha, a group of those always looks nice...I like the big pearsi as a focus point of the tank, everything else is so small in there! I'm personally not a fan of tinfoils and balas, but when those get big, It will definitly look nice... How are those monos you have growing out? Man, if I had that tank, expect to see some bichirs for sure haha...but with those CLs and other tiny fish....a 20"+ poly probably wouldn't be the best, but maybe you could try a delhizi or two? or maybe even a few senegals? Of course, Ive never had a lungfish, but if they get along fine with bichirs, why not?