Don't rush into the tank after the goldfish is bought back. Put the plastic bag containing the fish in the fish tank for ten to twenty minutes before opening it, and then let the water in the tank pour into the bag several times to gradually mix with the original water in the bag, so that the fish can gradually adapt to the water temperature and quality. If there is light, turn off the light. In the dark, the fish are quiet and not easily frightened.
Can't change the temperature of water sharply. Goldfish can survive in a wide temperature range, and can still live under the ice in winter. They can live normally in hot days as long as they are not exposed to the sun, but if the temperature changes sharply, they will get sick or die. The water temperature of fishmongers drops to 5 degrees or even lower in winter, and it is common for them to be above 30 degrees in summer. When you buy fish, you should pay attention to the water temperature in the aquarium and the water temperature in your aquarium. The deviation should not be too large, and it is generally allowed within 4 degrees. Therefore, the water must be stored for two or three days before changing the water, so that the temperature of the new water in the same tank is close to that of the water and the chlorine in the water is reduced.
You can't change water too much at a time, which will lead to water quality discomfort. Water quality includes pH value, hardness, residual chlorine, dissolved oxygen, nitrate, sulfide, protein and turbidity. Goldfish has adapted to living in the original water quality, all changed water, and suddenly changed the water quality, so goldfish can't adapt and suffer from water incompatibility.
If it is necessary to brew the bottom and wash the cylinder, some old water should also be kept. After washing the cylinder, return the water to the cylinder and then add new water.
Pay attention to the density of fish. Goldfish like large space for activities. Beginners often buy their favorite fish when they see them. They seldom care about how many fish can be kept in the tank. Even if they ask the fishmongers for advice, can they tell you to buy less for profit? According to my experience, it is more suitable to raise a centimeter-long fish with 3 liters of water. If your fish tank contains 100 liters of water, you can feed two fish with 10 decimeter or more, and eight fish with 5-6 decimeters (which are relatively narrow).
Goldfish are more active, strong and colorful in a larger space. Excessive density can easily lead to hypoxia and deterioration of water quality, which is the main cause of illness and death of goldfish.
6 how to feed. The most important thing to pay attention to in small-tank fish culture is to control the feeding, and it is advisable to eat it once or twice a day and within 5 to 10 minutes. Feed less on rainy days and don't feed at night. Fish need to consume more oxygen when digesting food. In rainy days and at night, the air pressure is low, so the oxygen dissolved in water is low. In this case, feeding fish may lead to serious hypoxia in the water and kill fish. Most dead fish occur at night, and severe hypoxia in water is one of the main reasons.
8 bait must be clean. Feeding unclean bait can easily lead to fish diseases. It is recommended to buy brand-name frozen fresh foods produced by professional companies, such as red worm and bumper shrimp, supplemented by beans and vegetables, so as to maintain comprehensive nutrition. Although goldfish like live food best, live food grows in polluted water environment, so be careful when putting it in.
Keep the water clean. Goldfish eat a lot, consume a lot of oxygen and discharge a lot of waste, all of which pollute water and breed germs, leading to goldfish dying of illness. In order to keep the water clean, a filter should be installed, and one tenth or a little more old water should be replaced every day while the educt is pumped from the bottom of the cylinder. Filtration with aeration design can be adopted, and filtration and aeration can be carried out at the same time, which not only purifies water but also supplements oxygen.
10 cannot bring oil into the water. Oil pollution will float on the water surface to isolate the air, so that the oxygen in the water can not be replenished, which will lead to the death of goldfish due to lack of oxygen. Eating meat or applying hand cream to your hands will bring oil into the water and should be carefully avoided.
1 1 It's best to start with the cultured goldfish. Chinese goldfish have strong foraging ability, strong physique and are less vulnerable to accidental injuries. We can start with raising Chinese goldfish, accumulate experience and then raise rare species, and then we can be handy and successful.