I have a 12 gallon tank that has three cory's and a few tetras. Two of the cory's are emerald green, and the other one is peppered.
They spend all their time laying on the bottom or hiding. The tank is well planted so there are plenty of hiding spaces, and the tetras don't seem to be bothering them. I rarely see them, even when the lights are off. More worryingly they seem to hang out on their own, and not together. They have been like this for about two weeks now.
I was advised by my LFS that cory's would be happy in a group of 3. Obviously more would be better, but due to my tank size I can get any more.
Perhaps I'd be better getting a greater number of pygmy cory's instead? Or maybe some Ghost Shrimp.
I'd rather not give up on these guys though.... and I am hoping you guys can advise something. I keep hearing about how playful these guys are.... and I am scratching my head here.
Should just add I have been checking the water chemistry and it is great. Also their barbels look fine to me.
Thanks in advance