Dear Mohammed,

Thanks for your answer. Distance between hatchery and nursery has advantages e.g. discharge water and wastewater and phytoplankton after treatment and release to sea, will not come back to the system. But have some disadvantages e.g. management in high distance is difficult, as you mentioned stress is more and etc. Now question is that if we have both hatchery and nursery in the same site, how to treat and release wastewater to sea that dose not threaten the system health and provide good biosecurity?

Thanks.