Not to be the bearer of bad news or anything... but to keep these three fish together, you are going to need a large tank. What size tank are they in now? The problems is that the gt and jd grow a little bit slower than the Jag. Depending upon the sexes, these fish might not even be able to coexist in a tank smaller than 240 gallons. Or they could all be female, and be fine in a 125. They are all great fish, but be prepared for upgrading and separating.