Stocking density: rectangular aquariums in China are not suitable for raising more because of their small size, but less for raising more. For example, in a container 40 cm long, 25 cm wide and 30 cm high, you can raise 6-8 grass goldfish 5-7 cm long. For example, a circular glass jar with a diameter of 26 cm and a height of 13 cm can raise 4~6 grass goldfish with a diameter of 4~6 cm. Adult fish with a body length of more than 8 cm should not be kept in small glass tanks, but in large glass tanks or ceramic tanks, and equipped with small oxygenators for standby to prevent hypoxia. These stocking densities are only reference figures, but also depend on the level of water temperature, the strength of fish and the quality of water, which cannot be determined mechanically.
Feeding: Feeding is full of nutritious animal feed and white sesame seeds. Animal feed, such as Daphnia, earthworm, Tenebrio molitor, caterpillar, dust mite, etc. The main feed is earthworm and white sesame. Both red earthworms and black earthworms can be fed. Don't feed the inferior grass goldfish you bought. Because this kind of feed has too much starch, poor nutrition, difficult digestion and easy pollution of water quality, grass goldfish will grow slowly and get sick easily after eating malnutrition. Grass goldfish will not die as long as they eat digestible food. Generally, feed it once every morning and evening, and it is not advisable to feed it more until it is finished. Otherwise it will pollute the water body.
Lighting: It is best to put the fish tank in a sunny place 1-2 hours. In this way, ultraviolet rays in sunlight are used for sterilization. Play a role in preventing diseases. This can reduce diseases. Try to prevent fish diseases, supplemented by drug treatment. At the same time, due to photosynthesis, the color of fish is more bright and beautiful.
Changing water: Changing water frequently can increase dissolved oxygen in water. When changing water, you can only change one-third to one-quarter, and you can't change a lot at once. The fish can't adapt. It is very important to keep the water quality of the aquarium clear. There is enough dissolved oxygen in the water to make fish grow and grow fast. Otherwise it will stop growing or even die. When to change the water is inconclusive, but it depends on the water quality. If the water quality is turbid, change it more or less.
2, the little red fish eat food:
Animal bait:
Daphnia: commonly known as fish worms. This is a daily activity, and its body colors are brown, reddish brown, gray and green. Fish and insects have seasonal growth, including summer insects and winter insects. Summer insects proliferated in large numbers around Tomb-Sweeping Day, with blood-red body color, large individuals, large numbers and high nutritional value. Most of them live in flowing rivers. Cordyceps sinensis is small in number, blue-gray in color and low in nutritional value. Most of them live in calm ponds or lakes. Fish worms are the main bait for freshwater ornamental fish, and goldfish and tropical fish feed on them all their lives.
Water earthworm: also known as red silk worm and red nematode, it belongs to the aquatic oligochaeta in annelids, and its body color is bright red or bluish gray. Most of them live in the mud on the shore or at the bottom of the river, and the surface of the mud is dense. One end is fixed in the sludge, and the other end produces sludge that vibrates in the water. When it is disturbed, it will immediately shrink back into the sludge. Earthworms have extremely high nutritional value, so they should be washed repeatedly with clear water before feeding. It is the favorite bait for goldfish and koi fish, and also the main bait for eel fry. After the low tide of Huangpu River in Shanghai, a large number of water worms were born in the silt on the shore, and a large number of people caught them every spring and autumn.
Plant bait:
Wuping: commonly known as rootless duckweed and ladybug, it is a perennial floating plant that lives in still water ponds or rivers. According to relevant information, Wupinggan contains 45% protein, vitamins and trace element cobalt, which is an auxiliary bait for freshwater ornamental fish. When fish and insects are scarce every autumn, Wuping is often used as an alternative bait.
Chlorella: Chlorella is bright green in color and resembles millet in the north. Its grain is as big as millet and contains high protein, fat, vitamins and trace elements. It is a good green feed for goldfish. If mixed with animal feed, it can effectively promote the rapid growth of fish. Chlorella mostly lives in still water ponds or rivers, and they mostly grow together in Wuping. It is rare to grow Chlorella only in natural waters.
Planktonic algae: There are many kinds of phytoplankton, such as Chlorella, Chlorella, dinoflagellate, diatom, gymnosperms, green algae, cyanobacteria and so on. Some of them are auxiliary bait for ornamental fish. According to relevant data, fry can be fed with green water or blue water containing algae, and the effect is also very good.
Artificial pellet feed: In view of the seasonal and quantitative instability of fish natural feed, which restricts the normal survival and development of fish, processed fish feed came into being. According to the variety, size and growth needs of fish at different stages, they rationally arrange the formula of nutritional components, adopt mechanized production lines, process, shape and dry in one stop, and produce a variety of granular feeds with comprehensive nutrition, which can completely replace natural bait. The common raw materials of artificial pellet feed are fish meal, egg pupa powder, barley powder, bran, yeast powder, vitamins, green feed and so on. They are mixed in a certain proportion and processed into granular feeds of various sizes. Artificial pellet feed is an auxiliary bait for goldfish, the best substitute for natural bait in shortage, and the main bait for red crucian carp and koi fish.