Severe changes in water temperature: The best temperature for tropical fish to survive is 25°C, but there are differences in the temperature requirements for different species, some as high as 30°C, and some prefer 20°C. Therefore, on average, 25°C is a generally acceptable temperature. If the temperature difference changes too much in a short period of time, the fish will go into shock and die. So usually pay attention to the thermometer in the tank to maintain the appropriate temperature. Ensure that the thermostat is operating properly.
The stocking density is too high: Many people see that the aquarium can put a lot of cute fish in a fish tank, so they also keep a lot of fish in the fish tank at home. This way of raising, no matter what kind of fish it is, it will die. The juveniles of the tetracarp family and the carp family live in groups, but if you raise a variety of different species of fish, you must consider the space for each fish and reduce the number of fish. No matter what kind of fish, there are many small fish in the tank, which is by no means a good thing.
Types of feed: The feeding habits of tropical fish vary depending on the species, and can be roughly divided into three categories: animal, plant, and omnivorous. Therefore, we must understand the type of fish in the tank, what kind of food they like to eat, and keep them in different categories. In terms of feeding habits, there are fish that like to eat floating feed, and there are fish that eat submerged feed. It is necessary to carefully understand the habits of fish. Generally speaking, there are many omnivorous tropical fish, but most of them like to eat live animal feeds (red worms, blood worms, stings, brine shrimp, etc.) .
Diseases: There are many reasons for tropical fish to get sick, including infection from purchased diseased fish, white spot disease caused by too low temperature, and water quality caused by spoilage of residual food or decomposition of fish dung. It is necessary to carefully observe the condition of the water tank often, and usually pay more attention to whether the various feeding equipment are operating normally, whether the water quality has deteriorated, the amount of dissolved oxygen in the water, the water temperature, and whether the fish is in good condition. The normal health status of fish is: eat normally, body color is bright, and swimming is natural. If the aquatic plants are planted at the same time in the fish tank, it is more suitable for the growth and development of fish.