This small brine shrimp hatcher will hatch up to two tablespoons (35 cc) of brine shrimp eggs, can be used for rotifer culture or even as a McDonald type hatchery for a small amount of fish eggs. Each 2.5-liter, molded-acrylic cone hatcher comes with a molded-in plastic drain valve, 6′ (1.8 m) of 3/16″ (4.8 mm) aquarium tubing, rigid air delivery tube, splash cap, air valve, collection cup and support stand.