(1) Fish tank: It is the place where tropical fish grow and move. Tropical fish must be raised in a slightly larger rectangular glass fish tank. ?

(2) Suction tube: it is used to suck out the dirt at the bottom of the fish tank when changing water, and is formed by connecting a soft rubber tube and a glass tube. The length depends on the height of the fish tank. Generally take one meter two to one meter five. ?

(3) Thermometer: used to measure and adjust the water temperature of the fish tank. ?

(4) Fishing nets: used to catch and transfer tropical fish. ?

(5) Glass lamp tube: put the bulb into the glass lamp tube and sink it into the fish tank for heating and lighting. The mouth of the glass lamp barrel must be 00 mm above the water surface to prevent fish from jumping in. ?

(6) Electric heating tube: used to raise the temperature in the fish tank in winter. ?

(7) Air pump: discharge the carbon dioxide in the fish tank and increase the oxygen content in the water. ?

(8) Filter: filter out the dirt in the fish tank, keep the water clean, and play a dual role in increasing oxygen and purifying the water. ?

(9) Thermostat: It is used to automatically control the temperature in the fish tank and can keep a constant temperature for a long time. ?

(10) Feed hopper: prevent fish food from floating on the water surface, which is beneficial to fish predation. It can also prevent fish food from falling into the bottom of the water and drilling into aquatic plants, blackening aquatic plants and sand and destroying water quality. ?

Peacock fish is the first choice for newly cultivated tropical fish.

Peacock fish is a small tropical ornamental fish, generally 3 to 5 cm long, petite, agile and lively, and colorful. It is mainly produced in Brazil, Venezuela, Guyana and the West Indies in South America. According to their different characteristics, it can be divided into common guppies, phoenix-tailed guppies, long-tailed guppies, guppies and yellow guppies.

Extended data:

Tropical fish are born in tropical waters. Tropical fish are divided into freshwater tropical fish and seawater tropical fish. However, in the near tropical zone and the north and south temperate waters bordering it, ornamental fish species are also classified as tropical fish, so their distribution also includes some subtropical areas. This paper introduces the species of tropical ornamental fish living in fresh water.

Tropical fish is actually a fish lover. In order to distinguish it from other ornamental fish, these ornamental fish endemic to tropical and subtropical areas are collectively called tropical fish. The hometown of tropical fish is mainly in Southeast Asia, Central America, South America and Africa. Among them, the Amazon river system in South America produces the most kinds and the most beautiful forms, such as the queen jujube fairy fish in tropical fish, which was born there. There are many kinds of tropical fish in Malaysia, Indonesia, Sri Lanka, Thailand, Myanmar and other countries. In the south of Guangdong, Yunnan and other provinces in China, there are also beautiful ornamental fish, such as Parthenocissus tricuspidata, white cloud snakehead and blue star fish in Xishuangbanna.

First, the type:

Arowana, colorful immortals, arhat, rat fish, abnormity, bream, peacock fish, giant fish, lamprey, ancient fish, blood parrot, cichlids, betta fish and raccoon dogs.

Second, feeding management;

1, water temperature conditions and adjustment methods

Tropical fish is a kind of fish with narrow temperature range, which has strict requirements on water temperature and is particularly sensitive to the change of water temperature. The water temperature it can adapt to is 20 ~ 30℃. Crossing the upper or lower limit of this range is life-threatening for most tropical fish-if the water temperature drops below 20℃, tropical fish will get sick or die; water temperature

Although it reaches 20℃, long-term low temperature will affect their appetite and growth; The temperature difference between day and night is too large, if it exceeds 5℃, it will also bring them discomfort, and it will lead to illness and death after a long time.

There are generally two ways to adjust the water temperature of fish: one is to directly heat the water in the aquarium, and the other is to indirectly raise the water temperature by raising the indoor temperature.

2, water hardness and adjustment method

Most tropical fish need to live and breed in soft water and low hardness water. The hardness of water is mainly determined by the amount of calcium and magnesium salts in water. Soft water is below 8 degrees, low hardness water is around 8 ~ 17 degrees, and hard water is above 17 degrees.

Generally, rain and snow are soft water; There are many red soil in southern China, and the water hardness in the rivers in the rainforest belt is low, mostly soft water. There is little rainfall in the north, high salt content in the soil and high water hardness.

The requirement of tropical fish for water hardness is not as high as that of water temperature, and water with higher hardness can also adapt. But farming needs low hardness water or soft water.

Tap water is a common water source for breeding tropical fish. The simplest way to judge its hardness is to look at the scale in the pot after the water is boiled, mostly hard water and less soft water. ?

3. pH value of water and its adjustment method

The pH value of water refers to the concentration of hydrogen ions contained in water. The pH value of water can be determined by pH test paper or tester. The pH value of tap water, well water and spring water used in life is not necessarily suitable for tropical fish breeding, and can be adjusted by using the principle of chemical reaction: adding sodium dihydrogen phosphate to alkaline water can make it acidic; Adding sodium bicarbonate to acidic water can make it alkaline. In the process of adjustment, a small amount of drugs should be added, and the pH value should be detected frequently.

The decorations in the water tank will also affect the pH value of the water. Sand at the bottom sometimes makes water slightly alkaline, while sinking wood makes water slightly acidic. Therefore, the water tanks of tropical fish in weak alkaline environment like cichlids in East Africa are paved with sand and stones, while those of tropical fish in weak acidic environment like South American fat carp are filled with heavy wood.

4. Selection of bait and feeding method

Most tropical fish are carnivorous, a few are omnivorous and a few are herbivorous. Carnivorous fish can be divided into fierce type and mild type. Fierce mouth, fierce temperament, like eat small fish, shrimp and earthworms and other large foods, such as Texas leopard fish, arowana; Gentle fish also have small mouths and like to eat small animals, such as water fleas and chironomid larvae.

When feeding, the fish should be fed selectively according to their feeding habits, and the selected food must be fresh, and the natural food should be fresh and frozen. Artificial bait should not be moldy and deteriorated. In addition, in order to avoid nutrient deficiency, as long as the fish can accept it, the choice of feed should be diversified as much as possible, and the varieties of feed should be changed frequently.

After selecting the bait, we must master the correct feeding method to make it grow fast and well. When feeding tropical fish, it is necessary to determine the feeding amount. The control method of feeding quantity is very simple, that is, feeding bit by bit. At the beginning, the fish will snatch food, and when the fish snatch food is not obvious, it can stop. If you feed too many fish at a time, it will remain in the water and affect the water quality. Generally speaking, feeding 1 ~ 2 times a day is enough. It is best to feed at the same time.

Three, breeding conditions:

1, water

(1), water quality

Fish should constantly metabolize and excrete feces, and the bait fed to the fish will continue to oxidize and rot, which will affect the water quality, so it is necessary to change the water in the fish tank often and timely to keep the water fresh. Water exchange is divided into partial water exchange and total water exchange. Partial water change is also called water change. Replenishing water means that you should replenish the water in the fish tank as much as possible. There is no need to take fish and aquatic plants out of the water tank. Generally, the amount of water replenished at a time should not exceed a quarter of the total water in the fish tank.

(2) Water temperature

Temperature is the most important condition for tropical fish to survive. Fish can't live without proper water temperature. Tropical fish have strict requirements on water temperature, and tropical fish are extremely sensitive to water temperature.

The normal temperature of most fish is 20 ~ 24℃, and the water temperature of culture is 25 ~ 28℃. There are two ways to control water temperature, natural control and manual control.

Natural control is to put the fish tank in a sunny room and let the fish tank receive sunlight to raise the water temperature. Some water temperature changes in the volume of fish tank are relatively small. On the contrary, if there is little water in the fish tank, the water temperature changes greatly. If room conditions permit, it is best to make the fish tank as big as possible.

Manual control of water temperature mainly adopts heating measures such as stove, kang and heater. In recent years, there are more and more electric heating appliances on the market, which is a better heating method. Most products have automatic temperature control function, so this kind of products should be the first choice.

(3) Oxygen

Any living thing needs oxygen. There is no life without oxygen, and tropical fish can't live without oxygen. The amount of dissolved oxygen in water directly affects the growth of fish, so make sure there is enough dissolved oxygen in the water. Dissolved oxygen in water can be obtained not only by adding water to replace water, but also by oxygen produced by photosynthesis of aquatic plants in water.

There is a special oxygenator-air pump in the market. It is convenient and simple to add oxygen to the air pump, and the appropriate air pump can be selected according to the size of the fish tank. The price is cheaper.

2. bait

Although there are many kinds of tropical fish and their habits are quite different, their feeding habits can be roughly divided into three categories: carnivorous fish, accounting for the vast majority of tropical fish; Omnivorous fish, accounting for a small part of tropical fish; Vegetarian fish accounts for a small part of tropical fish. The following are some common fish foods for carnivorous fish:

(1), Daphnia (also known as Tetranychus urticae)

Bright red in color, moderate in size, swimming in water in groups, rich in protein, fat and calcium. It is widely distributed everywhere, but the life span of this fish worm is very short, and it can only live for one or two days when it is recovered. Before feeding the fish, the worms should be washed before feeding.

(2) Cyclops (also known as Green Jump)

This kind of fish worm is small in size, low in nutritional value and easy to die. It is a poor bait because it jumps and stops in the water, and tropical fish, especially young fish, often can't catch up with it.

(3) Red nematodes (also known as water worms and nematodes)

This fish worm has a slender body and a deep red color. It lives in dirty blisters and shallow water near ditches. The worm's body is half in the mud and half in the water. Red nematodes are nutritious, contain more protein and fat, and are ideal food for adult fish.

Step 3 light

The growth and reproduction of tropical fish also need light. Fish with light will grow faster, fish will experience more beauty and the breeding cycle will be shortened. If you are in a dark room or a room with too dark light, people can't see the scenery in the fish tank clearly, and they can't see the tropical ornamental fish. The key of aquaculture technology is the selection and treatment of water quality and feed, which is based on the understanding and simulation of the natural ecology of the source of fish species. That is to say, when breeding tropical fish, we must pay attention to the characteristics of the waters in the hometown of the breeding object. Experience has repeatedly shown that if you want to raise tropical fish, especially precious and delicate high-grade species, you must create an environment in the aquarium that is the same or close to its natural ecology and conditions.

References:

Baidu encyclopedia-tropical fish