An embodiment of the invention includes a trapezoid settler having a longitudinal axis, a base, a first side wall oriented at an angle to the longitudinal axis, a second side wall opposing the first side wall and oriented at an angle to the longitudinal axis, and a coalescence fence connected to the first side wall and the second side wall. The coalescence fence has a first screen, a second screen oriented generally parallel to the first screen, and a media disposed between the first screen and the second screen.