well Rich; IMO there is nothing you can really do to any kind of fish; especially with Jars. In my experience with these guys they are very unpredictable; I suggest you keep an eye out though. Like I told you I too had a really nice Jar; ask Vien at first it was very calm and was cool with the rest of his tank mates then just went crazy and went after all the other fish. Not to jinx or discourage you or anything, just make sure you watch him. I used to have a 10" jar with my dats and my CK one day got home from work the CK was all messed up; I ended up giving up the CK. Then I noticed that it started going after my dats; so that was that got rid of the Jar, but you never know GL