So I thought I'd give target fish a go to bring the devil round. I was recommended that I give a school of silver dollars ago that are bigger than my devil. Well it lasted about 5 mins before u had to remove the dollars scales were flying and I didn't want him to kill the dollars. I returned the dollars and was offered to try rainbow barbs as a faster option but I'm not sure he will tolerate anything now. At 4 inches is this the norm for red devils