The poster said he really likes his fish so adding a red devil is not the smartest ideaclownie33;4121463; said:you could try puttting mor jd's of the same size or larger maybe a large lobster of some sort or a big red devil you could try pretty much any other large and aggressive ciclid but i fear that it will probably end up with one of the two dead if your honestly at wits end i would rehome your jd or put him in appropriately sized tank by himself i had to do this with a full grown red devil once because i was experiencing a similar problem anyways goood luck