Hey guys I am working on a pond at my house for catfish. I am looking for a pump big enough for a 40x40x10ft deep pond with a 6x12 waterfall. If I am correct that is about 120,000gallons. I have always used a pump that would circulate the volume of pond every two hours minimum, but I dont think I am gonna find a pump like that. So I am wondering what the best course of action would be. any info is appreciated.