Water change method:
In spring and autumn, it is usually carried out every half month or so 1 time. In summer, when the weather is heavy and the water temperature is above 28℃, the water should be completely changed 1 time in 5-7 days. In winter, when the water temperature drops to about 4℃, goldfish move slowly, their appetite decreases, and the water quality is not easy to deteriorate. Generally, all water is not changed unless there are special circumstances.
Feeding method:
(1) Just feed the fish food once a day, and feed three fish foods for each fish. Fish foods are sold in pet shops, and it is guaranteed to be eaten within 1-2 hours every day, and not too much.
(2) Feeding time: It should be around 7: 00 a.m. in spring and summer, when the sun begins to shine on the fish tank, around 8: 00 in late autumn and winter, and at 9- 10 in severe cold. Remember, you can't eat in large quantities in the evening. Even if goldfish are obviously foraging, they can only eat in small quantities around 3 pm.
Introduction to anchovies:
Anchovies, commonly known as "Coilia ectenes" and scientifically known as "Coilia ectenes", are rare economic fish. Anchovies are small migratory fish, which usually inhabit the open sea. Every year, they enter the river in groups from the sea in late spring and early summer, and spawn at the freshwater entrance in the middle and lower reaches. Distributed in Guyana, East China Sea and South China Sea.
Life habits:
Anchovy is a small migratory fish, which usually lives in the open sea. Every year in late spring and early summer, it enters the river in groups and spawns at the fresh water entrance in the middle and lower reaches. It is distributed near the estuaries of major rivers along the coast of China, with Tianjin Haihe River, the middle and lower reaches of the Yangtze River and the Pearl River Estuary as the most. The spawning period is from April to August, and the quality of anchovies in the middle and lower reaches of the Yangtze River is the best before Qingming.
Edible value:
Anchovies, also known as "black-backed fish", are one of the important small economic fish in the world, which are distributed in the major oceans of the world, and there are abundant anchovies in the East China Sea and the Yellow Sea of China. Anchovies are elongated, flat on one side, long 13cm, silvery gray, tender and delicious. It is often used in canned products in western food, commonly known as "whitebait fillet".
Feeding method of anchovies:
(1) The water temperature and PH value are appropriate, and the fish density in a certain range should also be appropriate.
(2) Put an oxygen pump in the fish tank to prevent hypoxia in the water.
(3) You can put some aquatic plants in the water, which is beautiful and can make oxygen, and some fish can also be used to satisfy hunger.
(4) The fish tank is equipped with a thermometer, which can turn on the light to heat it in cold weather.
(5) There must be a shelter on the upper side of the fish tank to prevent anchovies from jumping out.
(6) With the breeding of anchovies, remember to separate the mother tongue to be produced from the newborn fish.