Skimmer with flow enhancer

A skimmer for skimming water from a swimming pool or spa, comprising entraining means for entraining additional water from the pool or spa to thereby increase the flow of water into and out of the skimmer, said entraining means including a first nozzle member and a second nozzle member, said first and second nozzle members cooperating with each other to jet an entraining stream of water through the skimmer, and isolating means for isolating the entraining stream of water from the rest of the water flowing through the skimmer, said isolating means including actuating means for selectively actuating and deactuating said isolating means, whereby the skimmer can be operated at a first flow rate when said isolating means is actuated and at a second flow rate, which is greater than the first flow rate, when said isolating means is deactuated.