I agree theMeat. If I were you, I'd buy a premade setup that matches the flow you want. There are quite a few companies that make them now. Just make sure it will accommodate both elbows for Beans setup. Not all of em do.
Here is an eshopps one. Never used it but just example. This gives you low profile inside the tank.
Here is an eshopps one. Never used it but just example. This gives you low profile inside the tank.