hi every one im new to this forum and just started keep fish again. So right now i have 23 red bellies one black piranha, and i just to day had 5 saber tooth tetra die. dont know what happen but i herd they were hard fish to keep. So now im looking for something to replace them but i want something that is very aggressive. So can yall tell me whats out there that is not that hard to keep. Thanks guys