It is necessary to remove the chlorine gas when preparing artificial sea water. Dissolve sea salt in the aquarium tank and fill it with oxygen. It is best to use glass, plastic or other non-metals to prepare the water when changing the water. It is best to deploy the artificial sea 24-48 hours before use. Before checking the specific gravity, it is necessary to inflate, oxygenate, and filter to make the water temperature reach the appropriate temperature. If the specific gravity is too low, add sea salt, otherwise add water. It should be noted that records should be made after the deployment of artificial seawater. For future water changes, medical treatment, etc.