I just added a new discus to my 150 gal tank..there is one other discus in there...the new discus is a little smaller than the older one. the eldest one keeps bullying my new discus and i was wondering if this will eventually stop?
Its a bad idea to put a smaller fish in with a bigger established fish because he already has his territory set. You should always try and add fish that are bigger than the already established. It should slow down after a while but they will always try and show dominance.