Thank you all for the advice, I will certainly take it all into consideration. My girlfriend and I have already discussed the possibility of the EBJD growing up and being too aggressive for the rest of the tank. We are going to give it some time and see how he does, and in the event he is too aggressive we are prepared to set up a separate 55 or 75 gallon tank for him all his own. Fingers crossed that being introduced at a very small size and lots of time me growing up together helps him become more compatible!