Humanist
New Member
I have four albino corys which at certain times, enjoy whizzing around the tank at high speed. It's usually during the time when the tank lights are off but the room lights are still on. I wasn't too concerned about this, but I recently added 10 cardinal tetras, and they seem to find the speedy corries quite alarming since they are attempting to settle down for the night following 'lights out'. Is this normal behaviour for corys?