Here is a picture of my plumbing.
In the picture 1288.jpg, the ribbed hose is the intake, comes from the tank into the FX5. The clear reinforced hose is the outlet. It goes into a T (hiding behind the ribbed hose) were the CO2 goes in. This then goes into the Gamma UV shown in 1290.jpg going behind the fx5 and co2 tank (also shown in 1291.jpg). 1289.jpg shows the outlet of the UV going into another T where air enters at night. This is all 1 inch hose. It is then split into 2 3/4 hose's and returned to each end of the tank with the outlets pointing forward and toward the middle. My outlets are mid tank, to allow for CO2 distribution before the mist floats to the top.