As a rule, they have the lowest nitrate content, so it is enough to leave them in cool water for a while.
ຕາມກົດລະບຽບ, ພວກມັນມີເນື້ອໃນຂອງທາດ nitrate ຕໍ່າທີ່ສຸດ, ສະນັ້ນມັນພຽງພໍທີ່ຈະປ່ອຍໃຫ້ພວກມັນຢູ່ໃນນ້ ໍາ ເຢັນໃນໄລຍະ ຫນຶ່ງ.