Lost a bronze cory yesterday

[Chickadee55 75]

My first fish death since starting up my aquariums
This was one of the 3 new ones I just bought a few weeks ago. Its gills were pinkish, but they all look this way. Ammonia and nitrite are both 0. I tested immediately after finding it.

When I first got the new ones, there was one that hid a lot and didn't hang with the group. I don't know if this is the same one that died. It eventually came around, so I assumed it was stressed from the move. I didn't notice any looking ill the night before. The other 4 cories seem fine - active, social, eating well. Well, occasionally they just sit still on the bottom. This is normal right? I'm a little paranoid now. I am new to cories and want to make sure I'm not doing something wrong.

 

[GaryE35 33]

The sitting is normal. So, alas, is the loss of one after purchase. I wish it weren't so, but it's a common experience even in the best of tanks and from the best of stores. Shipping is a harsh process.