Best pump for chop systemsBy Kayne / If you are running a constant height one pump (CHOP) system if is a good idea to buy a reliable pump as it must run continuously. So be recommend the Jebao DC Sign Wave Water Return Pump on Amazon. You can find it here. There are 780 reviews for this pump and it almost has 5* stars. The manual and review videos are in the listing link. Related posts: Aquaponics4You Review