well iv have a stingray in my 135..an he did fine.u really dont need anything to turn the sand cus the stingray well take care of that for you..i had chromis. tangs an a few others.he never eat anything but the clowns.an that was cus i would feed him creel..and that was orange.lol. i feed 3 times a day an he never got any other fish,or clean up crw..good luck an post some pics when u get set up.