The Brine Shrimp Sieve is a well-constructed mesh-bottomed plastic receptacle that is used to collect newly hatched artemia, allowing you to quickly and easily rinse artemia in fresh or saltwater before they are introduced into your aquarium. Because the hatching solution contains any number of metabolites released during hatching, it is always advisable to give newly hatched brine shrimp a quick rinse before introducing them to your fish or before moving artemia to a culture tank. Doing so greatly reduces the risk of bacterial blooms. Place the Artemia Sieve in a shallow bowl and siphon the artemia directly into the sieve. Partially pre-fill the bowl with water to minimize mechanical injury to the baby brine shrimp. Can also be used as a dip net to skim artemia or other zooplankton and larvae from water's surface. Dimensions: 3" x 3.25" x 1.75" deep. 120 micron.