When do you add sea monkey eggs in the purified water?

You do not add sea monkeys eggs to purified water. Sea monkeys are a brand name for brine shrimp, which are small crustaceans that live in saltwater. Purified water is water that has been removed of impurities, including salt, so it would not be a suitable environment for sea monkeys. To hatch sea monkeys, you need to add the eggs to a container of saltwater that has been prepared according to the instructions on the package.