I am in the process of setting up a 150-gallon South American rainforest ecotope tank. While my primary interest is the small, peaceful, colorful South American tetras of which I would like to include four or five schools of 12-18 fish; I am in need of a "centerpiece" species that are found this natural habitat, My preference would be four or five small discus or angels. However, after reading extensively, I have found that both have pros and cons that would exclude some varieties of tetras from consideration. Discus (in addition to being difficult) require high temperatures, while angels can be predatory toward smaller tank mates. What, if any, is your knowledge and experience in such situations? Would I be better to settle for a variety (or two) of South American dwarf cichlids? Whatever your recommendation, are their any particular variety of discus, angelfish or dwarf cichlid would be most likely possible to attain a successful outcome?
Thank you for your time and cooperation. I welcome any suggestions or recommendations you might offer and look forward to your reply.