1. Buy sea crystal (there are many manufacturers, you can find it on Baidu), and then add it to fresh water according to the ratio in the instructions to turn the fresh water into sea water. 21. Artificial seawater

Recipe 1

Sodium chloride ( ) 24.72 grams

Potassium chloride ( ) 0.67 grams

Chlorination Calcium ( ) 1.36g

Magnesium chloride ( ) 4.66g

Magnesium sulfate ( ) 6.29g

Sodium bicarbonate ( ) 0.18g

Add distilled water to 1 liter

Dissolve the above salts in a small amount of distilled water, then add sodium bicarbonate, and finally dilute to 1000 ml with distilled water.

Recipe 2

Sodium chloride 45.0g magnesium sulfate 0.1g

Magnesium chloride 5.0g ferric chloride (1% solution) 1 drop

< p>First dissolve magnesium sulfate, potassium monohydrogen phosphate, and ferric chloride in a small amount of distilled water, and add distilled water to 980 ml. Then dissolve calcium nitrate in 20 ml of distilled water, add this solution dropwise to the above solution, and bottle it for storage.