The old three kinds of fish farming refer to changing water, raising temperature and adding salt. There is a sequence between them. Generally, the water should be changed first, then the temperature should be raised, and finally the salt should be added to the water.Usually in the early stage of fish illness, through the old three kinds of fish can continue to recover, do not need to give it medication.But if the condition is more serious, the old three alone can not be cured.
1. Water change: Fish farming must change water, but the water change in the old three samples is different from the usual water change, usually once a week, if the water quality is good, it can even be once a half month.But the old three kinds of water should be changed every other day, so as to improve the water quality as soon as possible, while reducing the content of harmful substances in the water, in order to prevent the aggravation of the disease.
2. Heating up: Many diseases are caused by low temperature, because low temperature will lead to a decline in its resistance. By properly heating up, it can stimulate its immune system and increase metabolism, thus expelling harmful substances faster, which is very helpful for subsequent rehabilitation.
3. Adding salt: Salt water can play a role in disinfection, but adding salt to the fish tank is not for disinfection, because the disinfected salt water has certain requirements on concentration. At this time, adding salt should not be too much, and the concentration should be controlled at about three to five thousandths, so as to increase the osmotic pressure of the water body and reduce the possibility of harmful bacteria invading the fish body.
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