Patented Brine Shrimp Hatchery. Feed live food to your fish, nauplii simply swim out of Hatchery into the aquarium after hatching. The eggs start hatching in about 18 to 24 hours. Hatched shrimp will swim out into the aquarium water as they mature. Simple to use, easy to feed your fish. Hatch"N Feeder can be used in either fresh or salt water aquariums.Includes: Hatcher Measuring Spoon Syringe Cleaning Brush Airline tubing This Hatcher can be installed in both Marine & Fresh water tanks. The Hatcher should be placed at a water level location using the suction cup (see Diagram).Keep the water temperature between 77F-82F.Connect airline tubing and air pump (STELLAR) to obtain aeration in the hatching chamber.Dump 0.05oz-0.07oz salt into Salt & Egg Deposit.Wait a few minutes for salt to dissolve in the water, then put 0.03oz brine shrimp eggs into the Salt & Egg Deposit; measuring spoons are included in the kit.The eggs absorb water and go down into the Hatching Chamber.They start hatching in about 18 to 24 hours.Hatched sea monkeys move up and down in the chamber with the water flow.Then they gather at the border surface between the marine water and the fresh water looking for slower water flow and preferable lighting.Sea Monkeys will stay in the Distributing Chamber for a while to get used to the fresh water. Then finally they will step out into the fresh water tank.The sequence will take about 24 to 30 hours.Rinse the Hatcher at least once a week or before the use after the interval.You may collect unfertilized eggs and shells at the water surface in the Hatcher.