A skimmer assembly for connection to a fiberglass swimming pool via a circular fluidic access port formed therethrough, and having a conduit for fluidic connection to the fluidic access port, wherein the conduit defines a circular end for connection to the fluid access port and an oppositely disposed rectangular end with a contoured body portion extending therebetween defining a flow path. The assembly further includes a skimmer defining a rectangular fluid inlet, a cylindrical skimmer body portion, a generally rectangular channel connecting the rectangular inlet and the cylindrical body portion in fluidic communication, and a fluid outlet connected in fluidic communication with the cylindrical body portion.