1. If you want to raise fish well, you must first learn to buy fish: healthy fish swim around in the middle and lower water, swimming naturally and leisurely, and the tail fin is clear, transparent and elegant. Sick fish generally sink to the bottom, float their heads, swim and struggle, and even have trauma (detachment) and severe bloodshot. In addition, don't buy single and individual fish.
2. Pay attention to the density of fish: because the tank or basin is relatively small, there should be 1-2 fish of 4-5 cm, and no more than 4 fish at most.
Fear of fish is one of the important reasons for getting sick. So after buying new fish, put the plastic bag containing fish in the fish tank for ten to twenty minutes before opening it, and then let the water in the tank flow back into the bag several times, and gradually mix with the original water in the bag to make the fish adapt gradually. Besides, if there is a light, you should turn it off. In the dark, fish are quiet and not easily frightened.
4, fish farming, water quality is the key, when changing water for fish, you should change one-third to one-half at a time, and you can't change too much water at a time, because fish have adapted to the original water quality life. In addition, fresh water should be slowly injected along the tank wall to avoid the fish being frightened. If you need to brew the bottom and wash the tank, you should also leave some old water. After cleaning the cylinder, put the water back into the cylinder and then add new water. Fresh water is best water that has been dried in the sun for more than 2 days (to ensure that there is enough oxygen in the water) and then left standing for one night (to make fresh water almost the same as the water in the indoor fish tank).
5. There is no filter in the small fish tank. When the water is not changed, the fish excrement can be sucked out by using the siphon principle with a small plastic pipe.
6. It is advisable to feed fish in a small tank once or twice a day within 5 ~ 10 minutes. Feed less in rainy days and not at night. Fish need to consume more oxygen when digesting food. On rainy days and nights, the air pressure is low, so the dissolved oxygen in the water is low. In this case, feeding the fish may lead to serious hypoxia in the water and kill the fish. Most dead fish occur at night, and severe hypoxia in water is one of the main reasons.
7, the feed should be clean, it is best not to feed some water-soluble things, such as bread crumbs, because the rest of the feed is easy to spoil the water quality. You can't bring oil into the water. Oil will float on the water surface to isolate the air, so that the oxygen in the water can not be replenished, leading to the death of fish due to lack of oxygen.
8, fish swim to the surface to spit bubbles, especially small fish tanks, typical hypoxia performance.