I have a few,I have a couple south american,a couple lake malawi,and a couple of african chiclids.I know they say not to mix them but I have no troubl with them.The water levels stay good,they all get along.I want something new,I have a oscar,and blood parrots,and a red devil,a electric yellow,a blueberry zebra,and a bumble bee.The blood parrots are my favorite.I want something that will get big and has alot of color,bright color preferably.I have 3 filters and I have sand instead of gravel,with plenty of fake plants and rocks and caves.Any suggestions ?