Brine shrimp hatchery kit is easier to fill with water, easier to clean, and you no longer need to find a place to hang the bottle. The brine shrimp hatchery kit comes with a base, an air tube, 3 packets of hatch mix, and complete instructions. All you need is a small air pump, a light source, and a 2 liter bottle.For hatching Brine Shrimp eggs (item number 449) not included.