Good on you, man. This may work for sometime but if either fish exceeds say 5 inches you probably should upgrade to a 40b to 55. In a larger tank you could also have more variety of non-cichlids like a school of tetras and maybe some bottom feeders but your pretty limited in your 105 liter imo.I'll cancel the convicts. I did research but didn't quite realise how big both got till actually checked. Thanks for the advice. Will 2 acara b OK?