So my tank is overstocked with blood parrots, red devils, red severums and a green terror. So far everybody is getting along well as juvies, however, I know they will start becoming VERY aggressive, therefore, I am getting a 125 or 175 gallon in the near future. However, for now, I am thinking of aquascaping the tank. Would placing three large granite rocks equally spaced and lined up horizontally on sand be good enough for cover, territories and swimming space? Its a 29 gallon by the way.