White Lumps On Albino Cory Catfish

[vonHelldorf]

I was wondering if someone could help me. one of my albino cory cats has little white lumps on it's body on both sides. they look a bit like warts and seem to be clumped together. it seems really happy and has been eating and swimming better than ever. I've noticed that he's been pecking at some plants I have.
 
 
has anybody ever come across this before?
 
It's a 24l coldwater tank. I have 3 albino cory cats, 4 zebra danios and 4 rainbow clouds. I have 3 plants in it.

 

[Blondielovesfish]

Does it look like ich?
Also, none of those fish are suitable for a tank that size.