10-25-2013, 02:15 PM
| || | The first thing that comes to mind is that you only have two. IME, the smallest amount you should keep is 4 but you should really go for 5 or 6 or more; The more the merrier. I have yet to see normal behavior out of a group of less than 4. You can mix cories that share similar patterns but this is still no guarantee.
Originally Posted by L J
I purchased two sterba's cory cats a couple weeks ago. I have a 30 gal tank with 3 Black Skirt Tetras, 3 minor tetras, and 4 neons.There is also a bumblebee cory that I VERY rarely ever see. The sterba cories do not interact with each other at all. One hangs out at the bottom on one side of the tank, the other is always hovering around the filter at the top of the tank. He will go to the bottom for a little while, then slowly swim back to the top. There are plenty of live plants, driftwood, and rock caves for hiding. The pH is 6.8, ammonia, nitrites, nitrates are all good. I keep the temp between 76 and 78 F. The tank is well established, been up and running for about 2 years. Even the one that hangs out on the bottom does not seem very active. Any advice?
Your pH and temp look good for Cories.
The slowly swimming to the surface could be a behavior issue if it is intentional surfacing.