Yup guess your right, i had 4 flower horns in my tank two 6 inches and two 3 inches flower horn and it sems like they hate each others but only on their own kind i had with them was two 3 inches red belly piranha by now it sems they are peacfull it been a month by now since this experement of mine and they come so peacefull specialy when i separate the two 3 inchs flower horn to a another tank but on my tank i put a stone tower alike for them to go circle with and it turns great they fight only accasionaly...hope this well go on...

Bernz