CATDOLL : CATDOLL: Fresh and frozen food for yellow croaker

1. Fresh food and frozen slices for yellow croaker

You can also feed frozen yellow croaker. In fact, it is more practical to use compound feed, which is simple to operate, more convenient to purchase, and easy to store. Now most people use slow-sinking feed, and some use floating feed. The price is also more advantageous than frozen fish.

2. What kinds of feed can be used to feed yellow catfish?

Small fish, shrimps, shellfish, snails, earthworms, and maggots.

3. How much does one pound of Zhengda yellow croaker feed cost?

The amount of feed input varies depending on the quality of the feed. The average feed coefficient of yellow croaker is around 1.9, and the cost of one kilogram of fish is approximately between 4.5 and 5 yuan.

4. What is the best feed for goldfish?

It is red worms + artificial feed, with reasonable nutrition, no need for water plants, my goldfish will eat any kind of grass,

1. Animal feed

Animal feed is one of the most nutritious feeds that goldfish like to eat. There are many varieties, the most common ones are:

1) Fish worms (commonly known as red worms, water fleas)

It is a kind of zooplankton that breeds in sewage ponds, pools, and rivers. It is the common name for various water fleas. Its size varies. Like red spider worms, its body color is blood red and its body is small. It is not only rich in nutrition, but also feeds on phytoplankton, which is beneficial to purify water quality. Therefore, goldfish that are properly fed with fresh red worms (not excessive) grow faster than those fed with other substitute feeds, have bright colors, and have a correspondingly lower incidence of fish diseases.

2) Sword water flea, with a bluish-gray body (commonly known as blue flea)

It belongs to the copepods among crustaceans. Its advantages are strong vitality, fast swimming, and can survive for several days. But its disadvantage is that it is small in size. If it is used to feed old parents of several years old, they will be more difficult to prey because they swim fast. Moreover, the sword water flea can bite small fry. Therefore, when feeding sword water fleas, it is best to scald them with boiling water.

3) Paramecium (commonly known as grey water)

It is the common name for several protozoa in plankton. For example, Paramecium can be cultivated with rice straw and is most suitable for feeding newly hatched fish fry. Rotifers are multicellular animals (i.e. composed of many cells), such as the turtle rotifer, water rotifer, column rotifer, bubble rotifer, etc.

4) The larvae of the mosquito larvae Chironomids (called bloodworms in the south and oil worms in the north)

It is the larvae of Chironomids, and its body color is blood red, so it is named bloodworms. It is rich in nutrients and relatively expensive. It is not easy to preserve and needs to be refrigerated. Generally, enthusiasts freeze it directly and then feed it to fish.

5) Earthworms

There are many kinds of earthworms, and goldfish love to eat them the most. They are rich in protein, fat and vitamins. They usually live on the surface of fertile rivers or flowing sewer sludge, with one end sticking into the sludge and the other end swinging with the water. They are small, soft, bright red or dark red, and easy to be swallowed by goldfish, but they must be rinsed repeatedly before feeding. If conditions permit, they must be kept for a few days until the earthworms spit out the mud before feeding.

2. Plant-based feed

Of course, animal feed is the most ideal for goldfish. However, in the case of lack of animal feed due to various reasons, plant feed can be an emergency or life-sustaining supplementary feed. Common ones include duckweed and water grass, among which duckweed is one of the smallest species of seed plants. The plant body has no rhizomes and is as small as sand, and the nutritional content is also good. Another type is small duckweed, which has a thin filamentous root. Goldfish will also eat it when they are hungry. Generally, only larger goldfish can be fed with it, but not too much. Before feeding, carefully check for pests and eggs, or soak it in a low-concentration potassium permanganate solution for a while before feeding, otherwise it is easy to bring in bacteria and pests.

3. Synthetic feed

To develop a large-scale goldfish breeding industry, catching natural bait fish and insects alone cannot meet the needs. In addition to developing artificial fish and insects, it is also necessary to develop the production of compound pellet feeds and supply them to the market. On the one hand, it can solve the feed source of the breeding farms, and on the other hand, it can also meet the needs of goldfish lovers to raise goldfish at home. With artificial feed, it is much more convenient to raise goldfish at home.

Formulated granular feed requires a complete range of nutrients to meet the needs of goldfish's growth and development. The main ingredients should include five categories: protein, carbohydrates, fat, inorganic salts and vitamins.

1. Protein is the main component of the goldfish's body. Its function in the body is to grow new tissues, repair old tissues, and is also a component of heat energy supply. There must be enough protein in the bait to promote the rapid growth of goldfish.

2. Sugar is the main substance of heat energy in goldfish and is the main feed ingredient for goldfish.

3. Fat is the food with the highest heat storage capacity. Its physiological function is the same as sugar, which is to oxidize in the body to provide energy. Generally speaking, if there is a lack of fat in the feed, goldfish will grow slowly and be small, which will reduce the fish's endurance to low temperature and hypoxia, and easily cause death during the winter; too much fat will cause the fish to be too fat, which will hinder the development of gonads.

4. Inorganic salts are the main elements that make up the skeleton, such as calcium phosphate and calcium carbonate. Fish blood and muscles also contain a certain amount of calcium and phosphorus. A certain amount of calcium in feed can promote digestion and help absorb fat and phosphorus. In addition to obtaining calcium and phosphorus from feed, goldfish can also penetrate calcium and phosphorus in water into the body through the skin and gills. Goldfish also need trace elements such as iron, copper, magnesium, sodium, potassium, and diamond. Without these elements, they will grow slowly and develop diseases. In order to ensure the normal growth of goldfish, these elements should be contained in the feed.

5. Vitamins are also necessary for the growth of goldfish. Long-term vitamin deficiency will cause the fish to be stunted, grow slowly or stop completely, and even produce deformities, and reduce resistance to adverse external environments and various fish diseases. Lack of vitamin A will cause the color fins to break, the fish's pigment to disappear, and the body color to become lighter and less bright; lack of vitamin E will cause the gonads to be stunted or not developed, and the resistance to aquatic fungi will be greatly reduced. Adding a small amount of vitamin B12 to the feed can promote growth.