First, raise fish with fresh tap water. Tap water can be used to raise fish, but it can't be directly added to the tank. But should raise fish first. Many novices buy tanks and put tap water directly to raise fish. The result is unforgettable!

Second, cold-water fish and tropical fish are mixed. The feeding environment and requirements of cold-water fish and tropical fish are different. Even if the water temperature is kept above 26 degrees, the flora balance cannot be maintained.

Third, excessive use of salt. Big salt is probably the most abused fish medicine. Salt can be used, but it should be used within a reasonable concentration range. Regardless of the marine fish factor, in most cases, the concentration of large salt ranges from three thousandths to five thousandths, but fish tanks with concentrations over five thousandths abound.

Fourth, don't change water for a long time. Water is the environment for fish to live. Too dirty water is not good for the health of fish, and even threatens the life of fish. Different fish species have different requirements for changing water, but there is no fish that does not change water. Even the crucian carp, which is called super lazy fish, needs to change water, just because of the different cycle length. What needs to be added is that fresh tap water cannot be used for the water changed into the fish tank.

Fifth, put drugs in disorder. Different drugs treat different people. It is possible that the same disease can be cured with different drugs, such as gourd disease. There are more than ten kinds of drugs that can treat this disease, but they can't be misplaced. There are two cases of misplaced drugs here. One is to use the wrong medicine, such as using antibiotics to kill insects, which is completely wrong; The other is overdose, such as trichlorfon. According to the purity of the medicine, the dosage is about 0.3G/T, but if it is used at 3G/T, the fish will die.

Six, the use of live food of unknown origin. Whether it is red worms, breadworms or small fish, it must be cleaned and disinfected before being put into the fish tank as fish food.

Seven, many fish friends and family members often make a small mistake-dirty hands to feed the fish. For the health of fish, please don't touch water with dirty hands, and don't touch fish food directly with your hands to feed fish.

Eight, cross infection. Too many fish die at this time every year. It is absolutely impossible for fish from different fishing grounds and different fish shops to suddenly merge into the same fish tank without treatment. Even if merger is needed, there is a fixed and scientific process.