Ok, you have to take in how many feet from the pump to the tank. Becouse pumpshave all diferent gph per foot. A small pump usualy can only pump 1 or 2 feet. So talk with someone, whoever you get the pump from and figure out your ffet to tank and how many gph you want. (gallons per hour) Then you have to get the water from the tank and back to the tank. :yes: