A fluid clarification system and method is described in which fluid is passed through one or more settling compartments, each having a solids outlet at the base of the compartment. The base of each compartment includes inclined surfaces for guiding settled solids to the outlet. Also described is a polymer reaction trough including baffles to promote gentle mixing of inflow fluid with flocculant. The system is designed to reduce costs of transportation, flocculent, and solids handling. The system is preferably arranged to facilitate transport on a skid or trailer, while maximizing fluid handling capabilities and minimizing costs.