Yesterday I've bought 3 bronze Corydoras to deck out my new 65 l aquarium. I was going to get four, but for now they must share the tank with a smaller bristlenose, and I felt it was unfair to keep 5 catfish in one new tank. When I move Mildred (the bristlenose) out, I will hopefully buy them another friend or two, tank permitting.
They seem to be settling in well, they are very active, and are feeding voraciously on the algae wafers I've been dropping in for them, as the tank is rather new and there isn't enough buildup for them to actually forage for right now. They keep swimming up and down the glass, and have extensively explored the new tank.
The smaller of the three I'm a tad worried about. It seems to have a bit of a fat gut, but it doesn't seem akin to cases of dropsy I've seen. It's also a little less active than the other 2, but is still very very active. It is also the only one I've seen taking the time out to hide in some of the ornaments I've set up, but is still, like I've said, very social and active.
Is it possible that it's sick or stressed, or could it be a female with eggs, scouting out potential spawning grounds? Or could it just be a fat cory for me to keep an eye on?
Other fish in the tank include 1 large angelfish, and 3 swordtails, as well as Mildred, the bristle nose. And I know I said the tank was new, but we used an entire bucket of water and all the gravel from a smaller tank it was replacing, as well as all the correct conditioners and stuff.
For the photos, it's the highest one up.