Selection of anhydrous magnesium chloride and magnesium chloride hexahydrate (MgCl2*6H2O) in aquaculture

In aquaculture, anhydrous magnesium chloride and magnesium chloride hexahydrate (MgCl2*6H2O) have their own applications. In general, if you need to quickly adjust the water quality, you can choose MgCl2*6H2O; If you need long-term stable water quality, you can choose anhydrous magnesium chloride.

1. Characteristics, advantages and disadvantages of the two compounds

Anhydrous magnesium chloride and MgCl2*6H2O are commonly used water quality regulators. Their molecular weight and chemical properties are different, so they are different when used.

Anhydrous magnesium chloride, formula MgCl2, is a white powdered compound. It is non-hygroscopic and easy to store and transport. Anhydrous magnesium chloride dissolves quickly in water and releases a large number of chloride and magnesium ions. These ions can react with impurities in the water to purify the water. Anhydrous magnesium chloride has little influence on the stability of water quality and can stabilize the pH value of water quality for a long time.

Magnesium chloride hexahydrate, chemical formula MgCl2·6H2O, is a colorless crystal. It can be stored and transported at temperatures below 40 ° C. Magnesium chloride hexahydrate quickly dissolves and releases magnesium and chloride ions. However, the water quality of magnesium chloride hexahydrate is relatively short-lived, so it needs to be replenished frequently. In addition, magnesium chloride hexahydrate tends to absorb moisture and become sticky, which is not suitable for long-term storage.

2, the choice in different situations

The choice of anhydrous magnesium chloride or hexahydrate magnesium chloride needs to be determined according to the specific use.

If you need to quickly adjust the water quality, we can choose magnesium chloride hexahydrate. Because it can quickly release ions, it can quickly purify water. When we need to improve the stability of water quality in a short time, magnesium chloride hexahydrate can be used. However, it should be noted that magnesium chloride hexahydrate cannot be used for a long time, because it will increase the concentration of magnesium ions in the water.

If you need long-term stable water quality, we can choose anhydrous magnesium chloride. Because anhydrous magnesium chloride can stabilize the pH value of water quality and other indicators for a long time, it is more suitable for long-term use. When we need to add water quality regulator often, we can choose anhydrous magnesium chloride. It does not absorb moisture easily and becomes sticky, making it suitable for long-term storage.

3. Precautions

When using water quality regulators, the following points need to be noted:

1. Correct measurement is required before use to avoid excessive or too little use;

2. Do not mix the two compounds;

3. When used, it is necessary to strengthen the frequency of water quality measurement to ensure that the water quality has been in the appropriate range;

4. Do not put directly into the fish tank without permission.

【 Conclusion 】 Both anhydrous magnesium chloride and magnesium chloride hexahydrate are commonly used water quality regulators. When using, you need to choose according to the specific situation. If you need to quickly adjust the water quality, you can choose magnesium chloride hexahydrate; If you need long-term stable water quality, you can choose anhydrous magnesium chloride. When using, it is necessary to pay attention to correct measurement and strengthen the frequency measurement of water quality to ensure that the water quality has been in the appropriate range.