My older Congo Tetras are seemingly becoming aggressive towards the younger Congos and shoo off other fish, also theyve started to hunt down and chase the CRS which they have never done before.
They are usually so placid i dont get the change in temperment.
Is it something to do with breeding or another natural occurance?
Any information would be greatfully taken on board.
Altho this is disturbing shift in behaviour it is also quite comical after theyve just chased another inhabitant they immediately come to the front of the tank as tho there looking at me like a naughty child would