all Red Sea Max systems have the little flow nozzles along the back wall. Depending on the size of the system, they will have anywhere from 1 to 4 nozzles. Then the Max system that include a sump (or have been upgraded to include a sump), have the larger return nozzle in the upper right or left of the tank.Hello nice stetup. do all the red sea Max have that return system? first time i noticed it........... following