I sold the fry when they were about 3-4 cm. I got another generation growing up now.
I believe you can only house them with tetras if the tetras are introduced before the EBJD. Also, it's a large tank (470L) and there are only two cichlids in there so that means that there is alot of room for the tetras to stay away from him. He doesn't even try to get to them really.
You don't possibly sell your trade your stock to anyone in the States do you? I would love to get my hands on some of your EBJD genes they look just stunning.