A system to separate solids from liquids is disclosed. In a particular embodiment, the system includes a series of alternating baffles disposed along a length of a tank, where the series of alternating baffles define a vertical tortuous flow path of the fluid from a first end of the tank to a second end of the tank to cause solids to settle out of the fluid. The alternating baffles each have a sloped planar surface disposed between a lower horizontal planar surface and an upper horizontal planar surface to cause at least one eddy in a vertical plane as the fluid flows through the tank. The system may also include a series of tanks in fluid communication with the at least one tank and secured side by side, where the solids progressively settle out from the fluid in stages as the fluid passes from one tank to another in series.