rule of thumb, dont mix africans with ca/sa. but....... i have a 3in african that survived 3 florida gars, when i moved them out, i put a texas and lowgrade fh in (not realizing that this little guy was hiding the whole time), so now i have 1 small 3in african in with 8" texas, 6" fh, and 4 jacks ranging from 3-8". not real sure why hes alive.... but yea, just by the pics it looks like you may have a 55g tank, which would be perfect for an african set up