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Cysts with a smaller size than the mesh will pass through the sieve, polluting the live nauplii suspension with indigestible material. Double sieving can only be done when the live nauplii are still small (first larval stage, instar I), which restricts the method to an optimal harvesting time and the nauplii to be at high risk of being damaged during the separation process. Damaged and dead nauplii are a less attractive feed and leak nutrients to the medium. Together with the presence of unhatched cysts and shells, these nutrients can induce suboptimal conditions in the larval tanks favoring unwanted bacterial development in the larval tanks, increasing biosecurity risks in the hatchery. Because of the clogging of the sieve, double sieving is not able to recover all nauplii and only a fraction of the obtainable Artemia biomass can be recovered, resulting in direct economic losses in the hatchery and increased production costs. All of these factors contribute to the fact that the double sieve is an inefficient and labor-intensive method, less suited for economic upscaling.