my chiclids are rubbing up against things now before i had 1 oscar and three balla sharks in there with 3 chiclids and only the chiclids where rubbing, now i have all chiclids no visible, spots on tale or anything, wondering if this is just a chiclid behavour. They only do this speraticly, and ocassoinally rub eachother but they are fighting for territory, i need to get rocks. not to many places for them to hid.