Basically, it is almost enough to change one-fifth of the water every day ~ ~ ~ It is best to use sun-dried water, so that chlorine can be removed. Also, when changing water, the temperature difference in the cylinder should not exceed 5 degrees.
In spring (March-May in the solar calendar), the temperature rises gradually, generally between 10-20 degrees Celsius, and the water temperature environment is more suitable for the growth and reproduction of various pathogens, especially in April-May, which is the high incidence season of fish disease-barley yellow. When fry hatch in early spring, fish eggs are prone to water mold; Fish fry mainly suffer from fish diseases, such as rotifer, melon worm, dactylophora, trematode and fish lice. In spring, adult fish are prone to microbial fish diseases, such as viral hemorrhagic disease, enteritis, gill rot, printing disease, silver carp iodosporosis and so on.
In summer (June-August in the solar calendar), the temperature is generally between 26 and 28 degrees Celsius, and the incidence of fish is slightly less than that in spring. At this time, the fish species gradually grow up and their disease resistance is enhanced. Therefore, the fish diseases of ciliates and flagellates are gradually decreasing. In addition, according to the investigation, there are still microbial fish diseases in spring and summer, such as gill rot, hemorrhagic disease, erythroderma, enteritis, printing disease and so on. At this time, it is more common for parasites to have anchor head disease. In midsummer, high-yield ponds are often prone to flooding.
In autumn (Gregorian calendar 9- 10), the temperature drops gradually, generally between 23- 15 degrees Celsius, and the water temperature environment is basically similar to that in spring, especially in August-September, which is the season with high incidence of fish diseases-"Bailuxin". Summer flower fish mainly suffer from fish diseases such as rotifer, melon worm, giant salamander, trematode and fish lice.
In winter (Gregorian calendar1February-February), the temperature is low, generally between 3-6 degrees Celsius, and fish diseases rarely occur. Winter is the stocking period of fish species, and fish bodies are often scratched by pulling nets or transportation, and water mold can also occur; When the water temperature is high, it is possible to produce flagellates and cucurbits. When the water temperature of the overwintering fish is lower than 10℃, the temperature difference between the indoor air temperature and the water temperature is too large, which causes the fish to be frostbitten when floating due to lack of oxygen.
At present, with the change of temperature in spring, summer, autumn and winter, there are 12 kinds of common fish diseases, among which there are 7 kinds of parasitic diseases: trypanosomiasis, cucurbitaceae, giant salamander, anchovy, ichthyosis, silver carp iodosporosis and China herring disease; There are five kinds of microbial diseases: hemorrhagic disease (erythroderma), enteritis, gill rot, printing disease and water mold. As the saying goes, "fish farming is not bad, but it is dizzy with wealth." In fish farming, once fish diseases occur, the growth and development of fish will be affected, and some fish will die in severe cases. Therefore, we must attach importance to the prevention and treatment of fish diseases and actively implement the policy of "early prevention without disease and early treatment with disease"
You can judge the sex of a fish according to its size, shape, color, tail whiskers and fins.
There are many kinds of fish. When you cut open the belly of a fish, you see that it is a female fish full of eggs; A male fish has a milky "fish white" without fish eggs. But if you are given a live fish, how can you tell the sex of the fish?
Or from the appearance to identify.
Look at the fins of the fish. Misgurnus anguillicaudatus, the female pectoral fin is blunt, and the male pectoral fin is sharp. The pectoral fin of male carp is larger than that of female carp. Male [jiāng] has long dorsal fin and anal fin, and there are some yellow-green spots on the ventral fin, while female fish does not.
Look at the size and shape of this fish. Carp and crucian carp, females of the same age in the same place are always older than males. Tilapia (also known as African crucian carp), the female fish's reproductive hole and urine hole are separated, but the male fish are combined, so the female fish has one more hole than the male fish, but the individual is smaller. Female whitebait is transparent and has no scales, while male whitebait has a row of scales above the base of anal fin. The female anchovies are big and full, while the male anchovies are small and thin.
Look at the color of this fish. Many fish change color. Male fish used to have a gray-black back and a silvery-white abdomen. In the breeding season, its body will turn blue, red and yellow, colorful and beautiful. During the battle, the color of the male fighting fish will suddenly change, and in the breeding season, he will also put on a beautiful coat, which is golden yellow. This is the "wedding dress"; The female fighting fish is not so gorgeous, and some gray stripes are exposed on the brown body. Male goldfish will have some tiny sand-like particles on the gill cover and fins-"idolization", while female fish will not.
Raise water before raising fish.
For fish farmers, there are four kinds of water: first, fresh water, that is, tap water that has just been aired or well water that has been newly drilled. Although this kind of water is clean, it is very different from the environment in which fish live in nature. Because there is no nitrifying bacteria community in the water, fish excrement and scattered food residues are rotted ... >>
Question 2: What should I pay attention to when raising red carp like this? There is nothing to pay attention to except adopting me! ^_^
Question 3: What should I pay attention to when raising red carp at home? The red carp is koi fish. Koi fish's feeding technology 1, feeding density Before feeding koi fish, we should first consider the size of the feeding container and the mantissa that can accommodate koi fish. Koi fish's appreciation mainly lies in its gorgeous colors, lithe figure, graceful movements and graceful group swimming posture, while koi fish must look from the back, that is, obliquely above, which is the best, but not as good as looking from the side. To fully meet these conditions, only gardens and ponds can be raised. But as city residents, not everyone has a garden, so they have to use an aquarium instead. The feeding density should be adjusted according to the size of the container, water quantity, water temperature, aerobic state, fish size and growth. 2. The varieties raised in the garden pool are generally red and white, Dazheng tricolor, Showa tricolor, gold or platinum, autumn water, light yellow and so on. In the aquarium, people can only see one side of koi fish, and they can choose reflective fish, such as gold, platinum, pine leaf gold, mountain blowing gold and other koi fish, and then match German carp. But whether they are kept in underground ponds or aquariums, most of them are mainly koi fish with bright colors, supplemented by dark, shiny and elegant ones. 3. Feeding method koi fish is an omnivorous fish, which can be fed with animal or plant bait, such as Daphnia, earthworm, shrimp, corn flour, biscuits, instant noodles, vegetables and even rice balls. However, in order to make koi fish colorful, besides factors such as light, background and water quality, it is more important to feed special koi fish artificial feed with high nutrition, which is flaky or granular. Baits can be thrown individually or alternately. Koi fish is a gluttonous fish. Eating too much will lead to food accumulation or constipation. Therefore, we should pay attention to the frequency and frequency of feeding, and take the principle of eating less and eating more meals, leaving no residual bait and no bad water. For hatched young fish, rotifers, Daphnia or egg yolk can be fed first. Small fish about 2 cm should be fed with bait such as red worms. For fish that grow to more than 5 cm, you can eat animal or plant bait at will. Here are some basic knowledge, you can have a look: zhidao.baidu/question/4515189.
Question 4: What should I pay attention to when raising red carp for the first time (1)? Parent fish culture pond 1-2 mu, with water depth of about 1.2 m, sheltered from the wind and sun, convenient for water injection and drainage, and per mu 150-200kg. In artificial reproduction, males and females should be separated to prevent them from mating and laying eggs by themselves. Disinfect with quicklime or bleaching powder before placing.
(2) Management: Strengthen parent fish cultivation and feed high-protein feed such as bean cake, silkworm chrysalis and fish meal. In recent years, some manufacturers have developed parent fish feed, which is rich in vitamins such as ve, which can promote development and improve anti-stress ability with good results. At the same time, in the process of feeding, attention should be paid to regulating water quality, supplementing fresh water frequently, keeping running water, and making gonads develop.
Question 5: How to raise red carp? Feeding techniques in koi fish.
1, feeding density
Before feeding koi fish, we should first consider the size of the feeding container and the mantissa of koi fish. Koi fish's appreciation mainly lies in its gorgeous colors, lithe figure, graceful movements and graceful group swimming posture, while koi fish must look from the back, that is, obliquely above, which is the best, but not as good as looking from the side. To fully meet these conditions, only gardens and ponds can be raised. But as city residents, not everyone has a garden, so they have to use an aquarium instead. The feeding density should be adjusted according to the size of the container, water quantity, water temperature, aerobic state, fish size and growth.
2. Variety collocation
When raised in the garden pool, it is generally matched with red and white, Dazheng tricolor, Showa tricolor, gold or platinum, autumn water and light yellow. In the aquarium, people can only see one side of koi fish, and they can choose reflective fish, such as gold, platinum, pine leaf gold, mountain blowing gold and other koi fish, and then match German carp. But whether they are kept in underground ponds or aquariums, most of them are mainly koi fish with bright colors, supplemented by dark, shiny and elegant ones.
3. Bait method
Koi fish is an omnivorous fish, which can be fed with animal or plant food, such as Daphnia, earthworm, shrimp, corn flour, biscuits, instant noodles, vegetables and even rice balls. However, in order to make koi fish colorful, besides factors such as light, background and water quality, it is more important to feed special koi fish artificial feed with high nutrition, which is flaky or granular.
Baits can be thrown individually or alternately. Koi fish is a gluttonous fish. Eating too much will lead to food accumulation or constipation. Therefore, we should pay attention to the frequency and frequency of feeding, and take the principle of eating less and eating more meals, leaving no residual bait and no bad water.
For hatched young fish, rotifers, Daphnia or egg yolk can be fed first. Small fish about 2 cm should be fed with bait such as red worms. For fish that grow to more than 5 cm, you can eat animal or plant bait at will.
Question 6: How to raise red carp 1 at home? Breeding of parent carp.
Selection criteria of 1: good body shape, strong activity and no damage, and the ratio of body length to height is 3: 1, which has typical variety characteristics. The female fish is at least 2 years old and weighs 1.5kg, while the male fish is better than 1kg. Carps in the first sexual maturity and aging period are not suitable for parent fish because of their poor egg production and egg quality.
2. Gender identity
Non-breeding season: the female fish has a wide body, a high back, a small head, a large and soft abdomen, a small and round pectoral fin and ventral fin, a flat or slightly prominent cloaca with radial folds; The male fish has a long and narrow body, a big head, a small and hard abdomen, a large and long pectoral fin and ventral fin, slightly concave inward, and no parallel wrinkles.
Breeding season: the abdomen of female fish is soft and round, and the * * * and reproductive pores are large and slightly red; The male fish has a small abdomen, and the gill cover, chest and ventral fin have obvious accessory features, such as iconicity, sunken reproductive pores, no redness and swelling, and milky white outflow when the abdomen is gently pressed.
3. Feeding management
(1) Feeding: parent fish breeding pond 1-2 mu, with water depth of about 1.2 m, sheltered from the wind and sun, convenient for water injection and drainage, and per mu 150-200kg. In artificial reproduction, males and females should be separated to prevent them from mating and laying eggs by themselves. Disinfect with quicklime or bleaching powder before placing.
(2) Management: Strengthen parent fish cultivation and feed high-protein feed such as bean cake, silkworm chrysalis and fish meal. In recent years, some manufacturers have developed parent fish feed, which is rich in vitamins such as ve, which can promote development and improve anti-stress ability with good results. At the same time, in the process of feeding, attention should be paid to regulating water quality, supplementing fresh water frequently, keeping running water, and making gonads develop.
Second, spawning and hatching
1. Timing of labor induction: When the water temperature rises and stabilizes above 16℃, labor can be induced. Usually, during the Qingming period to Grain Rain, after the cold wave, when the temperature rises steadily, induced labor can be induced.
2. Mode of induced labor
(1) Natural spawning is a very common way because of its small investment and scale.
Oviposition pond: a pond with an area of 0.5- 1 mu and a water depth of 1.2 m, which is convenient for water injection and drainage. Fish can be released in a week after being disinfected with quicklime.
Artificial fish nest: used to attach fish eggs. Choose soft, tough, non-toxic and non-perishable materials, such as pine branches, brown sheets, polyethylene sheets (woven bags) and poplars. , and wash, tie and disinfect (0.3‰ formaldehyde or malachite green) before use. Straw is not suitable for fish nests because it is perishable.
C Incubation pond: it can also be used as a fry breeding pond, with a small area (1-2 mu) and little silt. There is a disinfection pond with a water depth of 1 m ... The entrance and exit should be filtered with dense mesh to prevent impurities from entering the pond and fry from escaping.
D, polyculture and spawning: polyculture 35-30 groups of mature parent fish according to the male-female ratio of1:1.5, and slowly add fresh water. At the same time, pull 1-8 iron wire on the water surface, and hang artificial fish nests on the iron wire (or break bamboo in half and put it in the middle). Usually, each parent fish group should have 4-6 fish nests.
E management: Generally, eggs are laid from 22: 00 to 9: 00 on 2-3 days, so every afternoon, check and clean the fish nest, move the fish nest with eggs into the incubator, and replenish new fish nests. If it is not easy to lay eggs after collection, you can lower the water level to let the sun shine, add more ve to the feed, or use micro-running water. In order to ensure the uniformity of fry, the eggs of the day should be hatched together, which can also prevent the number of blind eggs from increasing due to the adhesion of fish eggs.
(2) Artificial induced labor: more common in fish farms.
Oxytocin injection: 600- 1000 IU of artificial chorionic gonadotropin (HCG) or 30-50 micrograms of luteinizing hormone analogue (LRH-A) is used per kilogram of female fish, or the dosage of male fish is reduced by half. Generally, it is injected into the chest of pectoral fin root at 6 pm on sunny days, and then moved into spawning pond, and fresh water is added for half an hour. The eggs can be laid after 6-18℃ for 5 hours (the higher the water temperature, the shorter the action time, and vice versa).
B spawning and fertilization: after spawning, the parent fish can spawn in the pond by themselves, and the method is the same as (1). If the eggs are collected manually, they can be picked up before the fish * * * * * *, and the water on the fish can be wiped off with a towel, and the eggs can be squeezed into a dry porcelain basin, and quickly squeezed into a * * *, which is fully fertilized by stirring with feathers, and then the fertilized eggs can be evenly smeared on the fish nest and incubated in an incubator. Or debonding with talcum powder solution and hatching with running water. When the water temperature is 16-22℃, seedlings can emerge in 3-5 days.
3 management:
(1) Natural incubation: 300,000-500,000 fertilized eggs should be put into each mu of pond, and the eggs of the same day should be put together to ensure that the fry specifications are neat. Pay special attention to prevent water from becoming moldy, which can be 0.3 ‰ > >
Question 7: How to raise koi fish for ornamental red carp is the general name of carp with ornamental color, stripes and body shape, and its biological characteristics are basically the same as those of common carp.
The original species of koi fish is red carp, which is said to have originated from koi fish in Longzhou, Guangxi, China, red carp in Xingguo, Jiangxi and golden carp in Hangzhou, Zhejiang. After long-term artificial breeding and cultivation by the Japanese, it became the present koi fish. In terms of colors and patterns, there are more than 100 varieties and 13 categories. According to historical records, about 1804- 1829 years ago, that is, 170 years ago, Japanese aristocrats put koi fish in a pond for the first time. Koi fish has a strong personality and a vigorous swimming posture. Have grace and fearless grace, even if you are put on the chopping block, you will not struggle. So the Japanese regard koi fish as a national fish. ". From 65438 to 0973, japanese koi, as a friendly envoy of the Chinese and Japanese peoples, settled in China. Koi fish originated in China, flourished in Japan and returned to China. At present, koi fish is loved by more and more people in China, and is known as the king of auspicious fish, feng shui fish, living gem in water and ornamental fish. Koi fish's life span has been recorded for more than 200 years, and it is regarded as a symbol of friendship, peace and good luck. This is a noble entertainment and beautiful enjoyment.
Koi fish is a long-term breeder, considerate and gentle. After training, he can recognize his master and get close to others, which is really cute. Raising koi fish can make people forget the hard work in their careers, and induce you to enter Taoyuan Wonderland, which is a lot of fun.
As long as you know some common sense, it is not difficult to raise koi fish.
1 Selection and configuration of aquarium
Koi fish has a large size and high activity intensity, so the aquarium should not be too small, generally it should be 120*45*45 (cm), and its water holding capacity is about 200 liters. Filters and oxygen pumps shall also be provided. Some filters are equipped with oxygen-increasing devices to facilitate defecation.
2 water temperature control
Koi fish is a wide-temperature fish. The water adaptability is 5-30℃, and the optimum temperature is 21-27℃; But the adaptability to the rapid change of water temperature is not strong. If the temperature difference is above 3-5℃, koi fish will get sick; Koi fish is suitable for weak alkaline water with PH value of 7.2-7.4; The contents of iron ions, chloride ions and sulfate ions in water are low; Sufficient dissolved oxygen; Low hardness.
3 feeding
Koi fish is an omnivorous fish, which feeds on mollusks, fragments of higher aquatic plants, benthos, even tiny algae or synthetic granular bait. It is best to feed synthetic granules and bait. Bean cake, vegetable cake, bread crumbs, fish worms, clams, crab meat, duckweed, etc. It is also acceptable. Be careful not to feed too much. Koi fish is a gluttonous fish. Eating too much will lead to food accumulation or constipation. Therefore, we should pay attention to the frequency and frequency of feeding, and take the principle of eating less and eating more meals, leaving no residual bait and no bad water.
However, if koi fish wants to have bright colors, it is more important to match the lighting, background and water quality, and to feed special koi fish synthetic bait with high nutrition, which contains natural colorants such as astaxanthin, which is beneficial to the coloring of koi fish.
Baits can be thrown individually or alternately. For hatched young fish, rotifers, Daphnia or egg yolk can be fed first. Small fish about 2 cm should be fed with bait such as red worms. For fish that grow to more than 5 cm, you can eat animal or plant bait at will.
4 water quality
Koi fish has high requirements for water quality, and the pH value of neutral water is 7 ~ 7.5. Aquarium is dirty and white, which is easy to cause fish diseases, so the party should pay attention to the cleanliness of water.
5 Not suitable for polyculture
Koi fish is a large ornamental fish, which is very different from other ornamental fish, and different kinds of fish are not harmonious together, so it is best not to mix with other fish.
Question 8: What are the breeding methods of red carp? Cultivation techniques of koi fish (red carp).
1, feeding density
Before feeding koi fish, we should first consider the size of the feeding container and the mantissa of koi fish. Koi fish's appreciation mainly lies in its gorgeous colors, lithe figure, graceful movements and graceful group swimming posture, while koi fish must look from the back, that is, obliquely above, which is the best, but not as good as looking from the side. To fully meet these conditions, only gardens and ponds can be raised. But as city residents, not everyone has a garden, so they have to use an aquarium instead. The feeding density should be adjusted according to the size of the container, water quantity, water temperature, aerobic state, fish size and growth.
2. Variety collocation
When raised in the garden pool, it is generally matched with red and white, Dazheng tricolor, Showa tricolor, gold or platinum, autumn water and light yellow. In the aquarium, people can only see one side of koi fish, and they can choose reflective fish, such as gold, platinum, pine leaf gold, mountain blowing gold and other koi fish, and then match German carp. But whether they are kept in underground ponds or aquariums, most of them are mainly koi fish with bright colors, supplemented by dark, shiny and elegant ones.
3. Bait method
Koi fish is an omnivorous fish, which can be fed with animal or plant food, such as Daphnia, earthworm, shrimp, corn flour, biscuits, instant noodles, vegetables and even rice balls. However, in order to make koi fish colorful, besides factors such as light, background and water quality, it is more important to feed special koi fish artificial feed with high nutrition, which is flaky or granular.
Baits can be thrown individually or alternately. Koi fish is a gluttonous fish. Eating too much will lead to food accumulation or constipation. Therefore, we should pay attention to the frequency and frequency of feeding, and take the principle of eating less and eating more meals, leaving no residual bait and no bad water.
For hatched young fish, rotifers, Daphnia or egg yolk can be fed first. Small fish about 2 cm should be fed with bait such as red worms. For fish that grow to more than 5 cm, you can eat animal or plant bait at will.
Question 9: How to raise red carp 1. Build a fish pond.
Humus soil should be selected for the pond, and the pond should be built in a place with leeward and sunny terrain, sufficient water (preferably mineral-rich spring water) and convenient drainage and irrigation. Domesticated koi fish can use courtyard space or roofs to build ponds. The parent fish pond covers an area of 30-40m2, the pond depth is 1.5-2m, the water depth is1.2-1.5m. The spawning pond is15-20m2, and the water depth is1.5m. Incubation pond is 3-5m2, with a depth of 0.8- 1 m and a water depth of 0.6-0.8m.. The nursery pond10-15m2 has a water depth of 0.5-0.6m and a water depth of 0.4m.. The area of the fish pond depends on the feeding amount, and the larger the area, the better. The depth of the pond is 1.5-2m, and the water depth is about1.5m.. It is best to build a cement pond, and the bottom layer is inclined to one end of the drainage ditch. Before the new cement pool is used, it should be dealkalized, filled with water, then added with straw or wheat straw, soaked for about 15 days to drain the pool water, and then washed with clear water several times. Then add new water for later use.
Second, breeding and seed cultivation.
The reproductive age in koi fish is generally between 3- 10 years old and the weight is above 1.5 kg. Koi fish was selected as the parent fish because of its strong physique, glittering and translucent color, obvious species characteristics, stable swimming posture and no illness or injury. Every year around May, when the water temperature is stable above 16℃, male and female koi fish can be picked out according to the ratio of 1: 3 and put into the spawning pond, and the sterilized fish nests are placed in the spawning pond in advance. After spawning, take out the parent fish and transfer the fish eggs to the incubator. After 5-7 days, the fry hatch. After the fry hatch for 3-4 days, they begin to float to the surface for food. At this time, they should be fished into the fry pond immediately. Use cooked egg yolk, soybean milk, seaweed and soft worms as bait. After 1 week, feed Daphnia, red worm and chopped earthworm, and supplement artificial compound feed appropriately, once a day 1 time. When the fish grows to more than 2 cm, it can be moved to the adult fish pond for feeding.
Three. Feeding and management of adult fish
Koi fish has a large appetite, and the stocking density is thinner. Large-scale cement pond culture, 3-5 fish per square meter is appropriate, grass, silver carp, bighead carp and so on. Are properly mixed. Koi fish is an omnivorous fish. Leftovers, peels, etc. It can be mixed with about 10% animal feed such as viscera, snails, maggots, pupae and earthworms. And making into granules for feeding. Feed should contain about 35% protein and 5%-8% fat. Should adhere to the "four fixed" feeding, generally twice a day, once in the morning and once in the afternoon. Feeding amount depends on water temperature, weather change and fish feeding amount. It is about 2%- 10% of the fish weight, and should be eaten within 20- 10 minutes.
Adhere to daily inspections, remove bait residues in time, and change water every 2-3 days in summer and every 4-5 days in spring and autumn. The water exchange rate is 1/3- 1/2 of the original pond. Keep the water fresh. Pay attention to increasing oxygen in hot and rainy weather to prevent flooding. Koi fish can be moved indoors in winter, the indoor water temperature should be kept at 2- 10℃, and digestible bait should be properly fed to ensure safe wintering.
Fourth, disease prevention and control.
Koi fish has strong vitality and few diseases, but it is necessary to disinfect the aquaculture ponds and fish bodies. Frequent application of quicklime and trichlorfon. The sick fish should be diagnosed and treated in time. The treatment of common diseases is as follows:
1, enteritis. Sick fish have poor appetite, slow movements and often swim alone. The fish body is black, the abdomen is swollen, the bulge is red and swollen, and yellow-red ascites flows out from the extruded abdominal wall. It can be controlled by adding 0.2g sulfanilamide to each kilogram of bait and feeding it to sick fish for 5 days. For fish that are seriously ill and do not eat, 500- 1000 international units of kanamycin can be injected intraperitoneally for 3-5 days.
2. Water model. The diseased fish is characterized by cotton wool-like gray hyphae parasitic on its fins. Oral administration of vitamin E, 0.4-0.6g per 10kg fish weight per day, can enhance the resistance. For sick fish, a mixture of 400-500mg/L salt solution and 400-500mg/L sodium bicarbonate solution can be sprayed.
3. Vertical scale disease. The body surface of the diseased fish is rough, the scales stand up and the scales are edema. Control methods: ① Soak fish in 2% salt solution for 5- 15 minutes, once a day, for 3-5 days. ② Oral sulfadiazine: firstly, the sick fish were raised in 0.5% salt water, stopped eating for 2 days, moved into clean water, and each fish was fed 0.2g, 65,438+0 times every other day, for 5 times in total.
4, small melon disease. There are white spots on the body surface, fins and gills of sick fish. In severe cases, the skin and fins of sick fish are covered with white spots and covered with white mucus. You can use 1 0-15mg L of formalin and1-2mg L of methylene blue to sprinkle in the whole pool,1time, once every other day, 2-3 times in a row ... >>
Question 10: What about the red carp you want to travel? If it's a fish raised at home, you won't stay indoors for more than a month as long as you travel for a short time. If you have a filter or oxygen bottle, leave it on and feed yourself before you leave. If you don't filter, change the backwater before you leave, so that the water won't be so mixed. If you feed it, as long as you don't travel for a month or two, you won't starve to death if you feed it once before you leave. If possible, you can put some live shrimp in the fish tank and let it catch it by itself. When you go out for more than a week, you will usually put some live shrimps, and you will leave them alone in less than a week. Being hungry for a few days has no effect and won't die.