One is a 8" deepwell that can pump 438 GPM of water that is between 65 to 70 degrees year round. I also feel like being able to keep water temps closer to the more productive range allow me to achieve more growth. The other is a modified Berkley irrigation pump. This little luxury pumps well over a 1000 GPM. With a solid 4" line pumping water out at around 20 mph I can make currents. It is amazing how some fish will come to life and feed when currents are present.
