Are My Cories Nuts?

[stoneagedinosaur]

I have 2 pepper cories, who are the most chilled out fish in the world. I have recently bought 2 cory sterbei (apologies for the spelling there) and they are completely mental. They just don't stop zipping around the tank. Have tried to photograph them as they are stunning but they won't stay still long enough. Are they normal?

 

[snowflake311]

It's good that they are active. They will chill out once they settle in and mature. Younger fish tend to be more active. I find my panda corys are more active then my bronze. Some are just hyper.

 

[mattlee]

what temp is the tank at as sterbai can tolerate higher temps than most other corys, this may be why they are more active that the others... try and get another 2 of each species this may well bring them out a bit more too as they like to be in groups especially same species groups