Building an Aquaponic System

Step 4: Circulating the system

 Fill all three barrels with pond or rain water. Put the pump in the fish tank and connect the flex hose from the pump to the top fish-food barrel. Turn on the pump and start the flow. The water is going from the fish tank - into the top fish-food barrell - into the second fish-food barrel - into the top bed via the 'T' sprinkler - along the top bed and down into the bottom bed - out the bottom bed and back into the fish tank.