When you buy a new fish, you must first raise it alone for a period of time, because it may carry some germs or parasites. In order to prevent it from infecting the old fish, it is best to raise it alone for about a week to see how it is doing. If it does not perform badly, you can prepare to close the tank.
In order to prevent cross-infection of fungi on new and old fish, they should generally be disinfected. Disinfection method is very simple, commonly used drugs are potassium permanganate, chlorine dioxide can also be used, different drug concentrations are different. Taking potassium permanganate as an example, the concentration is controlled at about 1-2 ppm, and it is suitable to soak for 15-20 minutes.
Before closing the tank, overtemperature the fish. Put the new fish into the bag with water, then put the bag into the fish tank, make sure that the water temperature difference is not too big before putting, then wait for a period of time, the water temperature inside and outside the bag will gradually be the same, so that the over-temperature is completed.
After the temperature is to do is water. Because there are certain differences in water quality, new fish directly placed in the tank may have a stress reaction, or even lead to their death. Water out of the bag needs to be poured into the bag, and then part of the water from the inside out, repeated several times can be removed from the bag, so that the new fish and old fish tank.
