If the fish is sick, the time of soaking in salt water is different according to the condition. Generally speaking, the concentration of salt water is about three to five thousandths, which can be soaked all the time and will not cause a burden on the fish. If sterilization is needed, the concentration should be increased to about 3%, which can only be soaked for about 5 minutes, and if it is 1% salt water, it can be soaked for 20 minutes.
1, 0.3% -0.5%: If the general fish is sick, the old three kinds can be used for treatment at the initial stage. At this time, the salinity is generally between three thousandths and five thousandths. Although this concentration cannot kill bacteria, it can change the osmotic pressure, thereby reducing the possibility of bacteria invading the fish body with the water.
2. 0.5% -0.8%: The concentration of 0.5% to 0.8% is slightly higher. It is generally used to treat some diseases on the body surface, such as congestion or albuginea. It can also be combined with various antibiotics. It should be noted that fish should not be raised for more than 7 days at this concentration.
3. 1%: The concentration of 1% is already relatively high, which can play a certain role in sterilization. Therefore, the soaking time should be greatly shortened. Generally, it can only be soaked for 15-30 minutes. If it is used together with potassium permanganate, the soaking time will be reduced by half.
4, 1.5% -2%: For fish with mild illness, 2% salt water can also be used. The soaking time is generally 10-15 minutes, but if the water temperature is high, the soaking time should be shortened.
5, 2.5% -3%: 3% of the concentration is relatively high, only in the case of serious illness can be used, usually the soaking time should be controlled within 10 minutes, and if the water temperature exceeds 18 ℃, this concentration of salt water can not be used, otherwise it will pose a fatal threat to the fish.
