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You are watching: What fish can live with koi in a tank


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Koi can live for as much as 40 years. Aleksander Dragnes / CC BY-SA

A koi pond rich with biodiversity is probably an ultimate goal for every pond enthusiast, as maintaining one can be both challenging and rewarding. Numerous factors influence the success of a koi pond, especially since the expansion of koi is dependency on water depth, pond size, climate and weather conditions, and even on various other fish in the pond. Exciting sufficient as a sole focal feature, koi progressively increase in size and can even live for as much as 40 years.

If you intended to flourish these together a organize of various other fish species, it’s essential to keep a couple of things in mind. First, choose for types that have similar pond requirements. These species will typically be found in wild pleasant habitats such together rivers, streams, and also lakes. As a dominion of thumb, however, opt for those the you can discover in a dependable fish or aquarium save to ensure that you don’t bring diseases into your pond.

Second, be afflicted with in mind the koi have tendency to check out all levels of a pond. This means that they will certainly inevitably connect with various other fish, nevertheless of where they like to reside in the water column. Though relaxed in nature, koi may be aggressive in the direction of some smaller types of fish (e.g., guppies, danios, mollies, and also minnows), specifically in an overcrowded pond. As opportunistic omnivores, lock may also eat their own fry. These scenarios are fairly uncommon, however, and should not take place if your koi are stocked with appropriate species and in a comfortably big set-up.


Why Keep various other Fish species With Koi? (Pond girlfriend Benefits)

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Bringing other types to your koi pond gives several benefits, such as regulating birds growth. Cohee in ~ English Wikipedia, CC BY-SA 3.0, via Wikimedia Commons

There are several benefits the other varieties may bring to your koi pond. As well as the aesthetic appeal that a varied pond provides, other fish might render ecosystem services, such together the regulation of algae growth, maintaining your liner or pond bottom clean, and regular pruning to stop plant overgrowth. Spring to increase your pond’s biodiversity? below are some fantastic pond mates that will peacefully grow alongside her koi.

List that the best Koi Pond Mates

1) Goldfish (Carassius auratus)

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There are many different varieties of goldfish and their appearance different greatly. James St. John, CC by 2.0, via Wikimedia Commons


The usual aquarium species, Carassius auratus is currently so extensively bred the there are numerous well-developed each other to pick from. Prefer koi, goldfish belong come the carp household (Cyprinidae), but differ from your cousins as result of their lack of mouth barbels. Goldfish have the right to vary considerably in regards to appearance and also color, and just about every kind of variation has been explored for its robustness and also longevity. The most typical type, i beg your pardon is regularly what young children find themselves farming in fish bowls, is single-tailed, red come orange in color, and largely inexpensive. In contrast, the rarest varieties can be explained as having the most bizarre features, such together bubble-shaped eye and large egg-shaped bodies, and also can sell for countless dollars!

The requirements of goldfish may vary depending on the breed, but most store-bought ranges are hardy and can do well in the end ponds. Goldfish prosper in water temperatures varying from 65 – 85˚F (18 – 30˚C). Despite they are a cold-water species, they can survive in heated ponds as long as there room cooler pond sections that are cast in shade. To maintain a water profile the is an ideal for goldfish growth, make use of a filtration mechanism that have the right to prevent the buildup the ammonia and also nitrates. Preferably, concentrations because that these nutrients need to be maintained at zero.

One of the benefits of growing goldfish alongside her koi is castle have similar ecosystem requirements and can consume the same species of food. Koi can also consume goldfish flakes, which have actually the exact same ingredients together koi pellets. You may likewise find goldfish schooling v koi and vice versa. Lock come indigenous the same household after all!

2) Grass carp (Ctenopharyngodon idella)

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Grass carp room a an extremely useful varieties as lock can regulate the expansion of aquatic vegetation in her pond. Rainer Lück http://1RL.de, CC BY-SA 3.0, via Wikimedia Commons


Do girlfriend have challenge controlling algae and also weed growth in her koi pond? If your answer is yes, then this fish might be the answer to your problems. One more member the the carp family, Ctenopharyngodon idella is an ext popularly known as grass carp due to the fact that of that propensity come consume aquatic plants. In fact, this varieties was carried to the US and Europe precisely for this reason – to manage the expansion of aquatic vegetation in lakes, ponds, and also canals. In controlled numbers, this types can market the very same ecosystem organization to your koi pond, though it is recipient to it is in wary and also regularly monitor the growth of your prized ornamental greens.

Found in turbid rivers and lakes in the wild, this types is highly adaptable to a selection of development conditions and can reach lengths the 100 centimeter (39 in) in enclosed settings. Through a lifetime of 5 – 9 years, grass carp are able to consistently consume enough plant product to support up to 40 pounds (18 kg) that body load in their adult years. Luckily, this species has a top-down method to spend plants, which means they i will not ~ tear the end plants native soil and cause your pond to be murky.

Also grew as an financially important food source, grass carp is now one of the most extremely produced types in aquaculture systems. Perform keep in mind that, despite these space widely cultivated, this species should not be get an impressive in a pond if over there is a risk of escape. Since of that hardiness, it has actually the potential to come to be an invasive species in her area and may cause ecosystem disturbances together they compete for food v wild fauna.

3) Suckermouth catfish (Hypostomus plecostomus)

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Suckermouth catfish can control algae growth along the walls and also floor the a small pond. Dquai, CC BY-SA 4.0, via Wikimedia Commons


A prized varieties in the aquarium trade, the suckermouth catfish is just one of countless pleco types that can provide a an important service for her pond. This certain fish has actually earned its name since of its ability to latch onto surfaces v its mouth, together a strategy to “suck” turn off algae. Because that this reason, this types and its near-relatives are frequently referred to together janitor fish. Having actually just a couple of of these may be an efficient strategy to regulate algae expansion along the walls and also floor the a tiny pond.

In the wild, this armored catfish is discovered in actively flowing streams and also rivers, and normally over rocky substrates. This rough natural habitat is testament to the strength and also hardiness of this species. Though a pond typically has stand water, you need not worry around this catfish inquiry a more powerful water flow. They can thrive to be rather comfortable in an fastened set-up and also can also mature to lengths that 15 inches (38 cm) end the food of 10-15 years. Together juveniles, they have tendency to it is in peaceful when kept in groups. Together they age, however, lock may come to be aggressive to one another, for this reason it’s ideal to limit your numbers in a pond.

Suckermouth catfish will prosper in a range of pond conditions, and can even withstand harsher nutrient concentration in water.Do be afflicted with in mind, however, that the water high quality itself need to still be good, specifically if you intended to advanced this species alongside koi. As catfish will typically stay top top the bottom of her pond and will not require any kind of special species of fish food, it is suitable pond mate for koi. Note that these catfish room nocturnal, and they will regularly be found hiding in crevices or under rocks throughout the day.

As this is a tropical species, they carry out require a warmth climate and also water temperatures in between 22-28°C (72-82°F), for this reason are ideal suited together pond mates to koi in nations with really mild winters (unless you can bring them indoors into an aquarium!).

4) Redear sunfish (Lepomis microlophus)

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Redear sunfish can aid with snail infestations. Ltshears, CC BY-SA 3.0, via Wikimedia Commons


Commonly well-known as redear sunfish, Georgia bream, chinqapuin, and sun perch, Lepomis microlophus is a vigorous and attractive addition to a garden pond! Though over there are many sunfish varieties that can prosper in an attached set-up, the redear sunfish is the many ideal for development alongside koi. This eye-catching types has orange come cherry-red markings on the operculum, i m sorry is a flap of tissue that protects the gills and also looks prefer a fish’s ear. In ponds, lakes, and also reservoirs, redear sunfish room often uncovered congregated in areas that are afforded security by logs or aquatic plants.

Every now and also then, snail infestations can occur in out ponds. The good news is this varieties is perfect for avoiding this! Yellow grub, a particularly nasty snail that have the right to parasitize top top pond fish, is just one unwelcome pond visitor that the redear sunfish deserve to eliminate. The no wonder this species is also known together the “shellcracker”. In ponds, the is normally discovered foraging close come the bottom the the water column, together it has actually a preference for warmer water and also a gentle, if not absent, current.

This durable fish should be included as an individual to your pond, unless increased alongside carnivorous fish, together they deserve to reproduce very quickly and also take over your pond. Castle reach sexual maturity in their second year and will develop spawning nests, usually depressions follow me the bottom if your pond has soil, above which castle will spawn in late-spring – early-summer. This shy species may rarely approach the surface. Be certain to store your pond water clear so that you can record a glimpse the this elusive wonder!

5) Largemouth base (Micropterus salmoides)

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Caring because that largemouth bass have the right to be more demanding contrasted to various other species, however, largemouth bass are important in maintaining populations in check. Clinton & Charles Robertson native Del Rio, Texas & mountain Marcos, TX, USA, CC by 2.0, via Wikimedia Commons


If you up because that a rewarding and educational experience, the largemouth base is a great fish to grow with her koi. Treatment for this types may be an ext demanding contrasted to other species on this list, however it must be totally manageable so long as a couple of requirements space met. Additionally called widemouth bass, Florida bass, and southern largemouth, this types is sure to be an eyecatcher together it progressively meanders roughly your pond. V a expectation of 10-16 years, this economically important fish can thrive up to 75 cm (29.5 in) and weigh up to 11 kg (25 pounds).

Largemouth base will require a bigger pond area to prosper comfortably. Contrasted to koi, it will additionally require a greater oxygen content in the water, for this reason a waterfall feature or a reserved pump would certainly be right to ensure suitable aeration. Be affected by each other in mind that this species is a carnivorous fish, and also will need live food. Ideally, to prevent your base from preying on koi and other ornamental fish, your pond should have actually a thriving population of spawning fish. The largemouth bass will be instrumental for keeping populations in inspect by feeding on fish spawn and larvae. Smaller fish, such together minnows, bluegills, and also sunfish will likewise satiate her ‘pet’ largemouth.

If possible, have actually only 1 – 3 people of this types in your pond, and also make sure to point out hiding areas to for sure maximal comfort. Because that this purpose, driftwood, rock caves, and waterlilies can be used to decrease instances that aggression. An additional consideration to keep in mental is the largemouth bass’ special demands for overwintering. Compared to koi, largemouth bass might need accessibility to deep heat water, depending upon where your pond is located.

6) Chinese high-fin banded shark (Myxocyprinus asiaticus)

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If you desire to add juvenile sharks to your pond, be sure to provide lots of hiding places like driftwood or rocks. OpenCage / CC BY-SA 2.5


Experts in ~ hiding, this shapeshifting types is no actually a true shark. They only possess your high dorsal fins while they room juveniles! Shockingly, they have the right to look really different as adults – nearly like totally different species. Once purchased from pet shops, young people of this pseudo-shark have alternating black and white bands. Together they reach lengths that 12 – 14 inches (30 – 36 cm), they gradually readjust in color and lose your bands entirely. Sexually maturation males have tendency to be reddish in color, whereas females adopt a dark purple hue. End the food of 5 – 6 years, this species can also grow come be an ext than 2 feet long, do it an ideal option for an outdoor pond.

Chinese high-fin sharks will certainly likely pick to stay at the bottom of her pond, and also would ideally like a high-quality substrate such as fine gravel. This types will require well-kept conditions, and may be susceptible to diseases in poor-quality water. Together a cold-water species, it thrives finest in temperatures in between 55 – 75 ˚F (12.8 – 24˚C). That is likewise sensitive come water pH and also hardness, favoring conditions often it was observed in freshwater aquariums (pH 6.8 – 7.5; 4 – 20 dGH).

See more: How Long Is 150 Cm In Inches In 150 Cm, Convert 150 Cm To Inches

If you incorporate juvenile sharks into your koi pond, make sure to provide many hiding areas like driftwood, aquatic plants, and rocks. The is additionally advisable to carry out them with open up space, however, together they will conveniently navigate across the center of your pond bottom. Moreover, they will appreciate ample water flow, along with high-protein food options to complement algae (which they generally consume). Don’t fret if you space unable to find them a few days after releasing them right into your pond, together they may simply be hiding from your koi!

7) Orfe (Leuciscus idus)

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Orfe can live increase to twenty years in proper pond conditions. Piet Spaans, CC BY-SA 3.0, via Wikimedia Commons


An attractive enhancement to your pond v unique actions to boot, don’t think twice about adding Orfe to her koi set-up if you room able to purchase them in your area. Periodically referred to as “Ide”, this torpedo-shaped ornamental types is constructed for speed and also can be an extremely hyperactive at times. Orfe prefer to stay simply under the water surface and like come go about their work in shoals. If you lucky, you will do it spot a couple of of them dart the end of the water, as though to signal various other fish in their group. Nonetheless, do watch out for orfe jumping external of her pond as this adventurous species is well known for trying to escape!

There are three arrays that are generally grown in ponds, and these include the golden orfe, silver orfe, and blue orfe. Of the three, the gold orfe is the most well-known one and can flourish up to 2 feet (61 cm) long, depending on the dimension of the pond. In nature, this varieties is normally discovered in clear cool waters, v temperatures varying from 13 – 25˚C (50 – 77˚F). Typically, orfe prefer to eat protein-rich snails, insect larvae, and fish fry in the wild. In ponds, their diet deserve to be supplemented through meat-based pellets and also mealworms.

With ideal pond conditions, orfe have the right to live up to 20 years. Regularly maintain your pond’s water quality and ensure the ample aeration is provided at every times. Watch this fish thrive alongside your koi for years to come, as they are friendly, fun, and timelessly fascinating!


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