I went to an LPS recently to buy supplies for my rats, and saw that one of their community fish tanks said "pygmy corydora" on it. Since I've already decided to have pygmy cories in a tank that just finished cycling, I decided to take some home. I'd planned to buy mine online, but they were right there, so hey, why not, right?
Anyway, I got them home and realised that they are a different species of dwarf cories, corydora habrosus -- rather than a thin stripe on the body, they have thicker, splotchier ones. No pictures right now because my camera is broken, but they look just like online pictures of c. habrosus.
I've heard that all three species of dwarf cories are pretty similar, but is there anything about the care for these guys that differs from c. pygmaeus?
I have six of them in my 15g planted with anacharis and anubias. They seem to be very active and playful, and especially like hanging out on a little rock cave I have in the tank. I try to drop their sinking pellets on the cave because they love feeding on it.
Additionally, I'm planning to add a betta sorority to this tank. It will be very densely planted at that point with lots of hiding places, and it's a tall tank so I'm assuming the betta girls will stay pretty high up most of the time and thus away from the bottom-dwelling cories, but is there any chance his might cause trouble? Or something additional I should do to make sure I can maintain peace between the two species?