well since this old thread has popped up again, I will add my two cents lol..
Here's a long story.. short.
When I introduced new baby cardinal tetras to my 55g once, the two Angels I had immediately went after them and I lost two cardinals right away. It seemed to be a kind of gut reaction that the Angels experienced and they just reacted on instinct. A very short few minutes later, they were all fine. I have had my two angel fish for a little over a year and a half now and they get along just fine with my cardinals that I have in there and have never bothered them since. Its as if they know that they are 'tankmates'... lol... and not fish food. Plus I have had the Cardinals for quite awhile now and they have grown and are bigger than neons. I just have a strange feeling that if I ever introduced young neons, which is usually what you find at the store, they would not last very long in my tank.
