Jumpy Catfish

[Francesjane]

Is there any reason that my Albino Catfish have become extremely skittish and jumpy this last 2 weeks?  The only difference I can think of is adding 2 extra Peppered Cory's one week and 3 Extra Glow fish another week.  Is there something now that I have upset because of adding new tank mates?
They never have hid anywhere to sleep unlike the peppers but something is clearly making them jumpy...and ideas?

 

[Lunar Jetman]

What size is your tank, what are your water stats and what is your current livestock?

 

[Francesjane]

Ammonia 0 - Nitrate 0 - Nitrate 20  (This morning)
 
I have a 64L with 6 Glow Lights, 3 Peppered Cory's and 3 Albino Corys...
 
They have only been jumpy this last week...like when I walk past, or kneel to look at them.  The largest one seems the worst and just about jumps out of the water with fright !!!

 

[Liv15]

Give them more hiding places to reduce the stress. Fish get ill easily when stressed. But I don't know why they skittish and you probably want to know why. good luck