How often do ornamental fish and goldfish change their water? How much is it per piece? How to divide the male from the female? How can we feed?

Goldfish and crucian carp belong to the same species in taxonomy, originated in China, also known as "golden crucian carp", similar to carp is an ornamental fish evolved from crucian carp. How often does the goldfish change the water? How much is it per piece? How to divide the male from the female? How can we feed? From Changsha Flower and Bird Fish Market, we know that there are many kinds of goldfish. There is a kind of cash flow is very expensive, the small a few yuan, the big hundreds. Generally speaking, the large varieties have to be between 30 and 100. But it's not a precious breed of small fish. It's cheap! The cheapest one of two centimeters is 0.5 yuan each. And it varies from 1 yuan to 10 yuan according to the size of the fish.

How often does the goldfish change the water?

1. How long the goldfish changes water depends on their own situation. If the water is muddy, or goldfish lack of oxygen, it should be changed immediately. Usually, it is changed every three or four days in summer, once a week in spring and autumn, and 1/3 of the original water body every half a month in winter.

2. For fish farmers, there are four kinds of water: first, fresh water, that is, just dried tap water or newly hit well water. Although this kind of water is very clean, it is very different from the environment where fish live in nature. Because there is no nitrifying bacteria community in the water, the feces and scattered food residues of the fish are decomposed into ammonia after spoilage, and the fish are easily poisoned. Second, the old water, light green or light amber, rich in humus and beneficial microorganisms and algae, has established a good ecological cycle system, which is decomposed into nitrate which is harmless to fish after nitrogen cycle. This kind of water is very good for the growth of fish. Third, green water, the water contains too much organic matter, so cyanobacteria, green algae and brown algae multiply in large numbers, the content of bacteria and microorganisms soars, and the water is thick green, sometimes giving off a bad smell, which can easily cause the whole tank of fish to die. Fourth, the return of clean water, also known as biting clear water, is that there are too many algae and microorganisms in the green water, which depletes the oxygen in the aquarium, resulting in the death of algae and aerophilic bacteria. turn the water into a stagnant water that is extremely clear, has no oxygen and has a large number of anaerobic harmful bacteria.

From this we can know that not all water is suitable for the life of goldfish, and the most suitable water for goldfish growth is old water. The so-called water culture is the process of turning new water into old water.

How do goldfish divide male and female?

1. Look at the belly of goldfish

Observe the goldfish male and female, many people's first reaction is to look at the belly of the goldfish, if bulging represents that the goldfish is pregnant, this is the female fish. But you can't tell if it's not in the breeding season. But also to consider whether the goldfish is sick to get pregnant.

2. Look at the size of the goldfish

First of all, we can start with the body size of goldfish. Adult male goldfish are as slender as willow leaves, while goldfish are often short and fat. Compare a tank of goldfish together, and you can soon see the male and female of the goldfish according to their size. This is an important basis.

3. Look at the goldfish tail

By observing the tail of the goldfish, we can also judge the sex of the goldfish. Generally speaking, male goldfish are stronger than female goldfish, especially the tail. Male goldfish have a broad and flat tail, which is obviously different from female goldfish.

4. Observe the swimming of goldfish

When goldfish swim, you can also see that male and female goldfish swim more agile. Swimming is also fast, female goldfish is more docile, swimming is slower.

5. Observe the color of goldfish

If you look carefully at the appearance of the goldfish, the brighter color is the male fish. In addition, the color of the goldfish is also a sign of whether it is healthy or not. if the color becomes lighter, the fish may be sub-healthy, change the water or immediately change to the food of colored fish. If the goldfish is treated early, the goldfish can restore its bright color in the shortest possible time.

6. Observe the cloaca of goldfish

Turn the goldfish over and observe the cloaca on the belly of the goldfish. The cloaca of male fish is narrow and long, while that of female fish is relatively large and round (ovulatory). This method is the most accurate to judge the male and female of goldfish. The editor reminds everyone that you must handle the goldfish gently. Fish are timid and frightened will get sick.

7. Observe the fins of goldfish

The fins of male fish are different from those of female fish and are relatively stout. If the fins of a goldfish are curved and thick, and conform to the above characteristics, the fish may be male. Females have shorter fins. In addition, in the breeding period, it is also good to chase stars, and those who chase stars (small white spots) are female fish.

How can goldfish be raised?

Food:

1. From the point of view of the nutritional composition of food and the growth of goldfish, live food is more beneficial to the growth of goldfish. For example, fish and insects, red worms, water earthworms, insects of the right size, and so on. Water fleas are found only in summer and autumn. Nematodes are found all the year round. Bread worms are relatively common, can be bought in general flower and bird markets, relatively clean, in which the protein content is very high, is a more suitable natural bait.

2. Single feeding is not necessarily healthy for the growth of goldfish. It can also eat plant-based foods, such as yellow algae, diatoms, green algae, Wuping, duckweed, aquatic plants, wheat bran, bean cakes, noodles, rice, bread and so on. In addition, there are all kinds of dry food-dried red worms and artificial feed.

Tips:

1. Wash the transparent fish tank (other utensils are fine, but be sure to be transparent) first.

2. Use soda, if there is no soda. Cold boiled water can be used instead. But remember not to use tap water, because there is sterilized chlorine in the tap water, and the little goldfish can't eat it.

3. Try to have as much water as possible to ensure good oxygen content and full freedom of fish. It is best to buy a small air pump for fish culture.

4. If there are no conditions to keep the water temperature of the fish tank, always give goldfish enough sunshine in this cold winter day.

5. Put some white rice stone and some aquatic plants in the fish tank, but remember that the aquatic plants must be appropriate.

6. in terms of feeding, you can throw in some fish and insects or white noodle steamed buns, but feed less and frequently each time.

In addition, note that small goldfish are particularly prone to white spot disease (a parasitic disease). If you find such things or scales falling off the fish, remember to go to the flower and bird market to buy a kind of "yellow powder" (mainly anti-inflammatory). Then drop some methyl blue potion (mainly to get rid of parasites) when changing water for the fish.