African cichlid isn't a species. If you can be more specific and tell us exactly what species it is, we can provide you with much better info. For all we know you have a few Kribs, or maybe a couple Jewels, possibly a Frontosa, or some Alunocara species.
BTW you better check your state fish and game laws, in most states its illegal to keep native fish in an aquarium without a permit, so removing those "walleye minnows" from the post might be a wise thing. You never know who's lookin on this site.