We guarantee a minimum hatch-out of 255,000 nauplii (baby brine shrimp) per gram of cysts following a 24 hour incubation period. Based on the most recent harvest, this equates to an average hatch-out of 90%. 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 are thoroughly disinfected in a hypochlorite solution during processing. Inventory is periodically tested, stored in a temperature-controlled (40 degrees F) warehouse, and packaged on demand. If you have any questions on hatching protocol, please visit our FAQ and Resources pages to find useful tips on hatching and storage procedures. We emphasize the importance of long term storage of artemia cysts in a freezer and/or short-term refrigeration!