Abstract: A tank system includes a primary arm and a secondary arm mounted on a trolley. Each arm is configured to independently rotate 340 to 360 degrees in horizontal planes. The primary arm includes a pivot frame for adjusting the vertical position of the secondary arm by pivoting the primary arm in a vertical plane. At least one nozzle and a submersible pump are mounted to the secondary arm. The tank system is mounted within a tank or other enclosure by securing the trolley to a track system within the tank or other enclosure. The trolley is configured to move along the track system within the tank or other enclosure. The tank system may pump a fluid from the tank in a pumping configuration, mix the fluid within the tank in a mixing configuration, and/or clean the tank in a cleaning configuration.