Precautions:
1. Preparation of artificial seawater: urban tap water, as the source of aquaculture seafood, must be dechlorinated before use;
2. Suitable water temperature: Mytilus is a low-temperature and high-salt variety, and its adaptive temperature is 12℃ to 15℃;
3. Sufficient dissolved oxygen: improve water quality, configure aeration devices, increase the number of water changes and reduce storage;
4. Adjust the pH of water: the pH of water is closely related to the survival of seafood;
5. Maintenance management: manage the closed circulation system well, and make three diligent inspections, cleaning and observation.