Abstract: A filtration system produces filtered water and returns captured solids to source water. The filtration system includes an intake filter subsystem fluidically coupled to the source water and to at least one pump, the intake filter subsystem configured to receive a flow of source water, capture organisms from the flow of source water, and produce a filtered intake flow of water. The filtration system is configured to operate in a plurality of operating modes, wherein, in a first operating mode, the filtered intake flow is received from the intake filter subsystem along a first fluid pathway to produce filtered water at a first system outlet, and, in a second operating mode, a flow of filtered water is provided to a second fluid pathway and a second system outlet to wash captured organisms back into the source water and maintain the source water environment.