So far, not too bad on those fish we bought there. Two neons died for sure (maybe a third one--or I just can't count to 8 with them moving around--not sure) by Sunday but no more losses since then (yet), and one of the other small orange fish died out of the six (also no more losses there). We'll be going back for replacements under the guarantee this week.
We're going to pick up a few more rosy minnows, too. They're cheap and pretty to look at. And I understand that they reproduce easily, though I'm not ready to go fishing yet.