Those fish should be fine together. Just be careful with the firemouth, they can get aggressive but usually only when spawning. Some suggestions would be rainbows, giant danios, maybe some dojo loaches or kuhlii (only with fine or sand substrate), Cory cats, pictus cats, if you're looking for unique you could try an elephant nose or african butterfly. Ghost cats would also make a nice additionHi Im currently cycling my 55g tank and would like some advice on stocking. I would like 10x tiger barbs 1x firemouth cichlid 1x red tail shark 1x plec Would these be ok together and what other fish could i stock with them Thanks