My friend recently gave me a featherfin synodontis which is 5 inches. My Jardini is 7 inches and in the 180 gallon. When I put the synodontis there, the catfish seems to follow the jardini around and making him agitated. He doesn't bite him but the jardini gets agitated and as a defense started biting the synodontis. Have anyone experienced any of this before? Are they just settling down? Help.