Brine Shrimp Direct guarantees a minimum hatch-out of 245,000 nauplii (baby brine shrimp) per gram of cysts following a 24 hour incubation period. This equates to a hatch-out of 90% and is based on the most rigorous sampling and testing protocol in the industry! Feel confident purchasing brine shrimp eggs from Brine Shrimp Direct. We will return your money if you do not achieve the specified hatching results from artemia cysts that have been properly stored and handled. Eggs have been recently tested, are stored in a temperature-controlled (40 degrees F) warehouse, and packaged on demand.