I can see how that would happen. Your stocking is light, and with the fish you have there is little perceived threat to the cories. Most schooling fish tend to group up more when they feel a little intimidated IME.
I can see how that would happen. Your stocking is light, and with the fish you have there is little perceived threat to the cories. Most schooling fish tend to group up more when they feel a little intimidated IME.