home Article How long can fish live without oxygen

How long can fish live without oxygen

Common pinch

Common pinch is a fish of the loach family that lives in water bodies of Europe. It has an elongated body 7-15 cm long.The body color is light brown with several longitudinal rows of rounded dark brown small and large spots.

The pinch is kept at a temperature of 3-30 ° C, pH 6-8 and dH 4-20 °. These are peaceful fish that get along with any neighbors. Pinchfish lead a near-bottom lifestyle and like to bury themselves in the ground. Thanks to the intestinal respiration, these fish can be kept in the aquarium without a compressor. The reservoir should be covered with a lid, as when the atmospheric pressure changes, the pinches become anxious and may jump out of the water.

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Labioses

Labioses are labyrinth fish measuring 7-10 cm. On the body there is a pattern of brownish-red and greenish-blue vertical stripes. In nature, lyabioses are found in Southeast Asia in slowly flowing rivers and lakes with dense vegetation.

Labiosa are considered the most peaceful of the labyrinth fish. They have no intraspecific aggression, so they can be kept in pairs or in large groups. This species tolerates temperatures from 22 to 28 ° C, therefore it can live in aquariums without heating. The pond is planted with plants (including floating species) and create a soft filtration without a strong current.

Macropods

Macropods are labyrinth fish 8-10 cm in size. In nature, they inhabit stagnant water bodies of Southeast Asia. Fish have large elongated fins; the sides have a pattern of blue and red vertical stripes.

Macropods are one of the most aggressive labyrinth fish. They are kept in groups of 1 male and several females. Macropods are unpretentious and hardy, they can be kept in an aquarium without a filter or heater. These fish can live without oxygen and tolerate temperatures from 15 to 26 ° C without harm to health. If kept without a filter, water changes must be carried out regularly.

Gourami

Gourami are labyrinth fish. The body length of most species does not exceed 10 cm. The body is graceful, flattened laterally; the pelvic fins are filiform, transformed into the organs of touch. The color depends on the species and usually includes silvery, golden and brown shades.

In nature, gourami live in shallow water bodies and rice fields in Southeast Asia. They are adapted to life in turbid and oxygen-poor water, so these fish do not need oxygen in the aquarium. However, cover the aquarium with a coverslip to keep the air above the water warm. Cold air damages the labyrinth organ of the fish.

Acanthophthalmus

Acantophthalmus are members of the loach family. They have an elongated serpentine body up to 12 cm long. The color is yellow-orange with wide vertical brown stripes. There are thorns under the eyes. In nature, acanthophthalmus are found in slowly flowing rivers and streams in Southeast Asia.

Acanthophthalmus are kept at a temperature of 24-28 ° C, pH 6-7.5 and dH 5-10 °. Due to intestinal respiration, these aquarium fish can live without oxygen, but they need clean water, so a filter must be in the aquarium. Acanthophthalmuses like to bury themselves in the substrate and hide under snags and other shelters.

Fish species that can live without oxygen in an aquarium

Aeration systems occupy an important place among aquarium equipment. They provide oxygen to the water, which is necessary for the respiration of the fish. However, they are often noisy, expensive, require a free socket and space for installation, and generate vibration. Therefore, many novice aquarists seek to have fish that live without oxygen in the aquarium. These fish are easy to find on the market, and they are not difficult to care for and maintain.

How many fish can live without oxygen

For fish that breathe only through their gills or through their skin, oxygenation of the water is vital. Their lifespan in an aquarium without aeration depends on the conditions of detention. In an overpopulated small volume, fish will live less than in a large tank, which contains only a few individuals. With an increase in temperature, the solubility of oxygen in water decreases, and the metabolism of fish accelerates, therefore, fish will live less at high temperatures than at low temperatures. Also, the lifespan of fish without aeration shortens the increased nitrogenous compounds in the water.

To avoid the death of the fish when the compressor is turned off, it is necessary to lower the water temperature and stop feeding. If the aquarium is overcrowded, fish should be seated in different tanks so that 1 individual has 5-6 liters of water. After stopping feeding 2-3 times, 20-30% of the volume is replaced with fresh water in order to reduce nitrogenous compounds. After taking such measures, the fish live in an aquarium without oxygen for up to 2-4 weeks. If measures are not taken, the fish will live no more than 5-10 days.

Cockerels

Cockerels are also labyrinth. In nature, they inhabit stagnant bodies of water and rice fields in Southeast Asia. During the time of keeping the species in captivity, breeders have bred more than 70 breeds that differ in color and shape of fins.

The cockerel is suitable for those who want to keep aquarium fish in a round aquarium without a filter. Because of the pronounced territorial behavior and intraspecific aggression, male cockerels are kept strictly one by one. Males do not need a lot of swimming space, so they can be kept in a small aquarium; to keep the water clean, change it 2-3 times a week.

Labioses

These are large, quiet fish. They need at least 10 liters of water per inhabitant. They are very fond of algae. From the feed they prefer small, varied. When breeding them, special attention should be paid to the temperature regime in the aquarium. A comfortable temperature for them is 25-28 degrees.

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How many fish can be populated

It is difficult to answer this question unambiguously. Both the size of the aquarium itself and the size of the pets play an important role. The larger the fish, the more water should be consumed per individual. For example, for a fish 5 cm long, 2 liters of water is enough. If the fish is 8-10 cm, then about 5 liters are already required. For large individuals, the size of which is more than 12 cm, you need about 10 liters of water for each.

However, there are many exceptions to this rule. If you have a low and wide aquarium, then the number of fish can be increased, since the water in it is better saturated with oxygen. If you plan to introduce any of the labyrinth fish species, then the population density can also be increased. But if you want to breed goldfish, then it will be more comfortable for them if there is more water for each individual, since they produce a lot of waste.

If the fish are inactive, then one pet requires less water than active, many moving fish.

Filtration and the presence of a compressor also affect the number of fish in the aquarium. If you have all the necessary equipment, then the number of fish can be increased, since the water in such an aquarium is purified and the air is saturated with oxygen.

The shape of the aquarium is important. Many people prefer round aquariums. Indeed, they are beautiful and fit well into the interior. However, it should be borne in mind that not all of them can be equipped with the necessary devices. For example, a small round aquarium, about 5 liters in size, made in the form of a glass, is not very suitable for permanent residence of fish. It is best used for temporary jigging.

In general, fish species such as catfish, cockerels, and lalius are best suited for round aquariums. The density of their settlement must be taken into account based on the characteristics of the fish. In addition, do not forget that the aquarium contains not only fish, but also soil and algae. Thus, it is necessary to subtract 10-15 percent from the volume of the aquarium, and only then calculate the number of individuals.

Schooling fish require more water and should be kept in large aquariums. Aggressive fish also require a lot of space.

When populating an aquarium, try to have inhabitants of all layers.

It is easy to determine them: if the mouth is turned upwards. the upper layer is located exactly. the middle one, looks down. the lower.

Considering all these recommendations, you can create a real ecosystem in your apartment, in which all its inhabitants will be comfortable.

What fish and how long can live without oxygen and a filter?

Many aspiring aquarists are looking to reduce their financial costs for setting up an aquarium. Indeed, equipping an aquarium with aeration and a filter requires a certain amount of money. In addition, these devices must be looked after, cleaned in time so that they do not fail. In this regard, many are faced with the question of whether there are fish that can live without oxygen.

Gourami

Peaceful fish, about 5-12 cm in size. There are a lot of varieties: pearl gourami, moon, blue, kissing, grumbling, marble, gold, chocolate. The names of the species speak for themselves. these fish are varied in color.

They are very unpretentious in keeping, peaceful in relation to other inhabitants of the aquarium, playful fish. A good option for the beginner aquarist.

Of the general recommendations, I would like to highlight the following. The aquarium must be at least 50 cm long and at least 50 liters in volume. Fish need space for cover and play. They are unpretentious in food, eat different types of food, however, it is important not to overfeed them. They need floating plants to spawn.

Types of fish that live without oxygen

I would like to note that there is not a single living creature that can continue its life without air. However, among aquarium fish, there are representatives that can not breathe oxygen dissolved in aquarium water, but receive it from the atmospheric air. Macropods, loaches and labyrinths are able to grab air from the surface of the water and keep it in their body for some time.

Loaches can draw air into the intestines. One of the brightest representatives of such fish is the corridor catfish. These are small fish about 3–7 cm in size. On their backs there is a shell of bone plates. The most common color is olive gray. These are peaceful fish that get along well with other representatives. They like to hide in shelters, they often dig out the ground in which they look for food for themselves.

There are about 150 types of corridors. The most common are such as golden, speckled, panda, shterba, adolfi, leopard, venezuela.

The average life span of this species of catfish is 10-12 years.

Macropod and labyrinth fish species have a special gill arrangement, which also allows them to swallow air from the surface. Consider the most unpretentious and common representatives.

Lyalius

Small fish, about 7 cm in size. Shy, it is best to start in a flock of at least 3 fish. They can even live in a small aquarium with a volume of about 10 liters. However, for comfort, it is better to buy a larger container. They get along well where there are a lot of algae, vegetation, because they like to hide.

It is not recommended to place the aquarium in a noisy and brightly lit room, as these fish are afraid of loud sounds and harsh light. They are unpretentious in food.

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Macropods

Hardy fish that can live even in a three-liter jar. They tolerate cold and tainted water. Macropods are pugnacious, do not like smaller neighbors. They are unpretentious in food, omnivorous. For the soil, it is better to use expanded clay, coarse sand.

It is not recommended to place narrow decorative elements in the aquarium, as the fish can get stuck and die.

The aquarium should have a lid that does not block the access to air. In addition, it would be ideal if the surface of the water is covered with algae.

Acanthophthalmus

This fish is rather difficult to care for. They prefer small aquariums. Shelters are needed. stones, driftwood, castles. These fish can jump out, so open aquariums are unacceptable. Breeding them is difficult even for professionals. In food, they can be content with microorganisms from the soil and waste of the rest of the aquarium population, however, they will be happy with live and frozen treats.

Acanthophthalmus

Acantophthalmus are members of the loach family. They have an elongated serpentine body up to 12 cm long. The color is yellow-orange with wide vertical brown stripes. There are thorns under the eyes. In nature, acanthophthalmus are found in slowly flowing rivers and streams in Southeast Asia.

Acanthophthalmus are kept at a temperature of 24-28 ° C, pH 6-7.5 and dH 5-10 °. Due to intestinal respiration, these aquarium fish can live without oxygen, but they need clean water, so a filter must be in the aquarium. Acanthophthalmuses like to bury themselves in the substrate and hide under snags and other shelters.

How fish breathes and gets oxygen

Before we can answer the question “Can a fish drown?” we need to see how the fish gets oxygen and how they breathe.

Since there is less oxygen in water compared to air, you need more efficient gas exchange surfaces to collect it.

Fish have gills that can absorb oxygen when it is only 5 parts per million (ppm). We breathe air, 21% of which is oxygen (210,000 ppm).

It’s not just about efficiency, gas exchange surfaces (like gills and lungs) need to be able to work with the environment you’re in (air or water). For example, our lungs can pump air in and out, but we will suffocate if water fills them.

So how do gills work? First, water must pass through them, which is controlled by the cap (this is a skin flap that acts as the border between the mouth and the gills). The fish lowers the bottom of the mouth. This makes the pressure in the mouth lower than the pressure on the outside, so the water is drawn in.

When the fish lifts the bottom of the mouth, the pressure inside becomes higher than the pressure outside. This forces water out of the mouth through the operculum and through the gills.

If you keep the fish at home, you can watch this happen, the lid moving with each breath. It is a sight to behold. one of the many reasons to keep fish.

The gills need a large surface area to extract oxygen from the water; a large surface area means that as much water as possible can contact the gills to diffuse oxygen.

When water comes into contact with the gills, oxygen is carried from the water to the blood through the edges of the lamellas. Each branchial arch contains rows of filaments and sipes, creating an appearance reminiscent of a car radiator.

The anatomy of the gills can be a little confusing, but here’s an overview.

Gourami

A fish from the order of perciformes, with a labyrinth organ. It is thanks to the structure of this apparatus that gourami extract air and provide themselves with oxygen.

A prerequisite in an aquarium is unhindered access to atmospheric air. In the wild, gourami were found in sewers, small, “stagnant” bodies of water, where water with low oxygen levels.

Gourami and other labyrinth fish need access to atmospheric air, and during transportation, oxygen pumped into the bag can destroy the fish, since it burns the respiratory organs of such a (labyrinth) structure.

There are quite a few species among aquarium fish that can breathe atmospheric air. With proper arrangement of the aquarium, they can be kept without additional enrichment of water with oxygen. However, the fish must have constant access to atmospheric air. If the surface of the water is covered with a continuous layer of floating plants, or the aquarium is tightly closed with a lid, the fish will die.

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Fish species that can live without oxygen in an aquarium

Aeration systems occupy an important place among aquarium equipment. They provide oxygen to the water, which is necessary for the respiration of the fish. However, they are often noisy, expensive, require a free socket and space for installation, and generate vibration. Therefore, many novice aquarists seek to have fish that live without oxygen in the aquarium. These fish are easy to find on the market, and they are not difficult to care for and maintain.

Lyalius

Lyaliusi are labyrinth fish that live in nature in slowly flowing streams, lakes overgrown with plants and in rice fields. The body size of lalius reaches 6-7.5 cm.On the sides there is a pattern in the form of vertical red and blue stripes.

They contain lalius in groups dominated by females. Lyalius can live without air in an aquarium, but filtration is desirable. Lyaliusi are rather shy, so it is recommended to plant the aquarium with plants to mimic the natural habitat. The species is sensitive to nitrogenous compounds in water and does not like temperatures below 24 ° С.

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Betta cockerel

Very beautiful fish, however, aggressive, do not get along well with neighbors. One fish needs 5-10 liters of water. Cockerels are omnivorous. There are special feed mixtures for them on sale. Vegetation must be present in the aquarium so that females have somewhere to hide during spawning, as well as from an aggressive male.

What fish can live without aeration (oxygen)

Some fish, which do not need a high oxygen content in the water, are able to use atmospheric air for breathing, due to the presence of special organs or another method (gill labyrinth, intestinal or skin respiration).

How long fish can survive without oxygen.

Many fish will survive without an artificial supply of oxygen, but only with an open aquarium! Without access to air, fish with additional respiratory organs die. Therefore, the surface of the water should not be completely covered with plants.

Lack of oxygen

No matter how unpretentious the fish that live without additional enrichment of water with oxygen, they can also suffer from a lack of it. Critical air in water for each type of underwater inhabitants is different.

  • rapid breathing, “protruding” gills;
  • fish swim from above and swallow air;
  • even bottom fish often swallow air above;
  • decreased activity of pets;
  • over time, the brightness of the color decreases, resistance to diseases, growth slows down.

The oxygen consumption of the fish in the aquarium increases after feeding, when the water temperature rises, at night, especially in the presence of dense vegetation. All aquatic plants absorb oxygen at night.

How long can your flowerhorn fish stay without oxygen or an air pump how to save your fish

The most effective way to save fish suffering from oxygen deprivation is to install a compressor with an air stone. The air stream dissipates, then rises to the surface, stirring the water and saturating it with oxygen. In a small aquarium, the compressor may not be stationary, but temporary in order to preserve the decor. It is enough to connect it for 40 minutes a day (or if necessary) and clean it up until the next time. At the same time, you must not take tap water! She must be settled.

If temporary measures do not help, stationary equipment is required to supply oxygen to the aquarium. a compressor and a filter. The filter is needed to purify water from organic matter, the decomposition of which absorbs a significant part of oxygen. The power and type of filter depends on the volume of the tank. an external filter is required for a 500-liter one, and an internal one is enough for a 50-liter one.

The necessary conditions

Aquariums without filtration and aeration require more careful maintenance, including:

  • initially competent selection of pets, taking into account species characteristics (aggressiveness, size, living conditions);
  • regular cleaning with a siphon;
  • partial water change every 2-3 days;
  • tight control of the number of inhabitants to avoid overpopulation;
  • timely thinning of the aquarium flora to prevent overgrowing of the home reservoir;
  • close observation of the condition of pets for the timely detection of problems and diseases.

There are aquarium fish that can do without oxygen.?

No matter how diverse the fish are, they cannot live without oxygen. This concept does not mean the lack of breathing, but the ability to live in water with low oxygen. In nature, these are stagnant waters of swampy areas, rice fields, and enclosed bodies of water. Similar conditions occur in small aquariums without filtration and aeration systems. Only unpretentious fish are suitable here.

With filter

Loach and tropical catfish are able to draw air into a special part of the intestine. The sacgill catfish and Clarius use the supragillary cavities for breathing. These amazing animals can live for a long time not only without oxygen, but also without water. In nature, they move in this way from one reservoir to another.

The most popular among aquarists are bottom catfish, for example, speckled catfish. Usually they serve as “orderlies” of household ponds, removing food debris. But, like bottom dwellers, they contribute to the raising of suspended matter from the bottom, muddy the water. In an aquarium densely populated with catfish, filtration is necessary.

Most fish use cutaneous respiration. For inhabitants of stagnant bodies of water with warm water, this figure can reach 80% against the usual 10–20%. Young growth is even less demanding for aeration. These are catfish, eels.

Fish that need a filter but can do without aeration include:

  • aquarium catfish;
  • acne;
  • loaches.

Fish that definitely need a filter and oxygen

There is confusion that barbs and goldfish can also live without a filter and oxygen, but this is not the case. For them, additional equipment is needed (filter, compressor)!

Barbs are suitable for small tanks, especially dwarf.

But goldfish in small or round aquariums will live much less than the time given by nature, even with increased care.

Without a filter

These are creeper or labyrinth fish, which during evolution have developed additional labyrinthine bony plates with folds of mucous membranes, thanks to which they are also able to use air for breathing in an aquarium without oxygen. Aeration is not necessary for these fish.!

  • cockerels (fighting fish, betta);
  • all gourami;
  • ctenopoma;
  • macropods (paradise fish);
  • swordsmen;
  • lalius and others.

Schooling fish require less volume per fish. Undemanding to the guppy’s habitat. A flock of 6 can be kept in 40 liters with multiple neighbors.

Once a week it is necessary to change the water and siphon the soil!

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