Soak seaweed in cold water. When making seaweed soup, soak the seaweed in water for 3 minutes. Just soak in water three times, about ten minutes. Seaweed needs to be soaked mainly because the seaweed will contain some fine sand when purchased. It needs to be soaked in water to remove the fine sand. Soak it in clean water before eating, and change the water 1 to 2 times to remove pollution and toxins.

Soak seaweed in cold water. When making seaweed soup, soak the seaweed in water for 3 minutes. Just soak in water three times, about ten minutes. Seaweed needs to be soaked mainly because the seaweed will contain some fine sand when purchased. It needs to be soaked in water to remove the fine sand. Soak it in clean water before eating, and change the water 1 to 2 times to remove pollution and toxins.