If the fish tank is large enough, it is better to keep 4 ~ 6 goldfish. Too much will not only affect the beauty, but also lead to too low oxygen content in water, resulting in lack of oxygen in fish. Change water regularly to ensure the cleanliness of water quality, and sterilize the fish tank and the corresponding instruments in the fish tank regularly. Under normal circumstances, it is just right to raise four fish, pay attention to the size and match them reasonably. About three liters of water can raise a fish about one centimeter long. If the fish tank can hold 100 liters of water, you can raise three goldfish with a body length of 10 cm, or about 8 such fish with a body length of about 5 cm.
2. What kind of goldfish is good to raiseGrass goldfish, lion head, Ryukyu gold, dragon eye, pearl scale, dragon eye and so on can be raised. Grass goldfish is also called golden crucian carp, or grass gold for short. Grass gold is a primitive species in goldfish varieties, and it is a large-scale feeding variety in ornamental fish at present.
Caojin has strong ability to adapt to the environment, large size, strong physique, strong vitality, and wide and miscellaneous feeding habits, so it is a relatively good variety to raise. Grass gold is divided into single-tailed grass gold and dovetail grass gold.
Dovetail grass gold is named because its tail fin is like dovetail and its tail is bifurcated, which is mainly characterized by short body and especially large and long tail. Dovetail grass gold is graceful, with slender and elegant fins, which is very ornamental. There are mainly red and white patterns on the body, and some are special, showing colorful or glass flowers.
Lion's head is also called tiger's head. It is short but strong, with sarcomatous protrusions on the top of its head. There is a strawberry-shaped square sarcoma on the gill cover, and the eyes and mouth are trapped in the meat, which looks fierce and abnormal, and has great aesthetic feeling, hence the name Lion Head.
There are many kinds of Ryukyu and gold, and their disease resistance is extremely strong. Their main morphological characteristics are small head, sharp mouth, short and round body shape. Dragon eye is named after its eyeball bulging outward. It is short and thick, with dorsal fin and caudal fin, and its head is flat and wide. The scales of pearl scales are covered with a large amount of calcium, and the whole performance is hard hemispherical protrusion.