February 6

Sarah Robertson

Care Guide for Corydoras Bilineatus

Corydoras are well-known for their carefree and calm personalities. They're ideal for inexperienced fishkeepers and provide a wonderful contrast to any aquarium. The Corydoras Bilineatus is not an exception! This little guy is one of the most popular corys due to its peaceful nature and pretty, bi-colored pattern.

Corydoras Bilineatus are brightly colored fish. It gets its name from the two white or silver lines that stand out against its pigmented body. The rest of its body is a beautiful golden brown with darker spots.

These fish, more commonly known as the San Juan Cory, is an aesthetically pleasing species most notably found in the Amazon and its rivers located in Peru, Western Brazil, and Bolivia. Being that they are a schooling fish species by nature, it's best to purchase multiple Corys at once so they feel comfortable within their social surroundings.

They have a relatively low-maintenance diet and are peaceful by tankmate standards; however, for further assurance of compatibility with other fishes, particularly larger ones, it's always good practice to do your research prior!

In the wild, Corydoras Bilineatus can be found in South America. They inhabit slow-moving rivers and streams with sandy bottoms. These fish do best in groups of 6 or more, so be sure to purchase at least 6 for your home aquarium.

If you're thinking about adding a Corydoras Bilineatus to your tank, read on for everything you need to know about their care, diet, and habitat.

A Quick Corydoras Bilineatus Care Table 

  • Scientific Name: Corydoras bilineatus
  • Common Name: San Juan Cory, White Striped Cory
  • Diet: Omnivores
  • Care Level: Easy
  • Compatibility: Peaceful
  • Ph: 6.5 - 7.5
  • Temperature: 71.6 - 78.8°F
  • Water hardness: 4 - 18°N (71.43 - 321.43ppm)
  • Minimum Tank Size: 30 gallons
  • Tankmates: Tetras, Rasboras, Danios, and other peaceful fish
  • Breeding: Egg layers
  • Size: 2.0 inches
  • Life expectancy: 3-8 years

Corydoras Bilineatus Size

The Corydoras Bilineatus can reach a length of 2.0 inches. They are a tiny species of corydoras that would be ideal for smaller tanks.

The size of your Corydoras Bilineatus will depend on the quality of care they receive. A well-fed and cared-for fish will grow to their full potential, while a neglected fish may stay smaller. Some factors that can affect their growth rate include diet, water quality, and stress levels.

Genetics also plays a role in the size of your Corydoras Bilineatus. If you are interested in breeding them, be sure to select a pair of fish that are similar in size.

Corydoras Bilineatus Lifespan

The Corydoras Bilineatus has a lifespan of 3 to 8 years. This wide range is due to the many different factors that can affect their lifespans, such as diet, water quality, and stress levels.

You can help your Corydoras Bilineatus live a long and healthy life by providing them with high-quality food, clean water, and a stress-free environment.

Corydoras Incolicana

Corydoras Bilineatus Appearance

The Corydoras Bilineatus is a small and brightly colored fish. They get their name from the two white or silver lines that stand out against their pigmented body. The rest of its body is a beautiful golden color with darker spots.

These fish have an elongated and oval-shaped body. Their fins are translucent with black tips. Like other corydoras, they have a single dorsal fin and an adipose fin. They also have barbels on their mouths, which they use to help them find food.

Gender Differences

The gender of Corydoras Bilineatus can be difficult to determine. The best way to sex these fish is by looking at their fins. Females will have shorter and rounder fins than males. Males will also have a longer and sharper anal fin.

Another way to tell the difference between males and females is by their size. Females are typically larger than males.

Corydoras Bilineatus Behavior

The Corydoras Bilineatus is a peaceful and sociable fish. They prefer to live in schools of six or more individuals. In the wild, they are frequently found near the bottom of rivers and streams, searching for food. They do best in an aquarium with lots of hiding places. Because this species is timid, it may be scared off by rowdy tankmates.

Corydoras fish must often take breaths of air, which is typical and not a cause for alarm. If there isn't enough space between the water's surface and the hood, the fish may strike it. They keep the air in their stomachs to help them digest food more effectively.

The Corydoras Bilineatus is a nocturnal fish, so they are most active at night. During the day, they like to rest in hiding places or near the bottom of the tank.

Corydoras Bilineatus Tank Setup

It's not difficult to set up a Corydoras Bilineatus aquarium. They are robust and adaptable, so they will survive in a variety of circumstances. To guarantee that your fish are content and healthy, follow these instructions.

Tank Size

A school of Corydoras Bilineatus needs a tank with a capacity of 30 gallons. If you want to keep many schools, you'll need something larger. A bigger tank will provide the fish with more hiding places and allow them to spread out. It will also assist in lowering waste production and ammonia levels. This will make it easier on you when it comes to cleaning the tank.

Water Conditions

Corydoras Bilineatus are tropical fish that can tolerate a wide range of water conditions. However, they prefer water at 71.6 - 78.8°F and with pH levels of 6.0 to 7.5 However, they can survive in other water conditions too.

Ammonia, nitrites, and Nitrates are all poisonous to fish. While Corydoras Bilineatus can tolerate Nitrates better than other fishes, it is still harmful to them. Make sure that the water you use does not have any of these substances.

Every two weeks, water changes should be carried out. This will keep the water clean and help to prevent the accumulation of pollutants. Make sure to condition the water before adding it to the fish tank. To evaporate chemicals, use a water conditioner that removes chlorine and chloramine from the water or leave the water in a bucket for 24 hours. 

Note: Poor water conditions may lead to various health problems.

Note: Poor water conditions may lead to various health problems.


There are many different filtration systems available on the market. Hang-on-back filters, canister filters, and under gravel filters are all suitable for a Corydoras Bilineatus aquarium. The size of the filter you need will depend on the size of your fish tank. A good rule of thumb is to choose a filter that can turn over the entire volume of the tank at least four times per hour.

Tank Decor

There are many ways to decorate a Corydoras Bilineatus aquarium. Live plants are always a good idea, as they provide the fish with hiding places and help to oxygenate the water.

If you do decide to add plants, make sure they're tough and resilient enough to be uprooted. Java Fern and Anubias are two great choices. If you don't want to use living plants, artificial or silk vegetation can be used instead.

The Corydoras Bilineatus is a shy fish, so you'll want to add many hiding places like driftwood, rocks, and caves. Also, be sure to give the fish enough space to swim around comfortably by leaving some open areas in the tank. Finally, take care that any decorations or objects you put into the tank don't have any sharp edges which could injure the fish.

Corydoras Bilineatus fish thrive in tanks with soft substrates like sand because it helps keep their barbels clean and debris-free. In addition, choose a substrate that is not too small; Corydoras Bilineatus fish have been known to ingest smaller substrates.

If you opt for a gravel substrate, be sure to rinse it off before placing it in the tank. This will eliminate any harmful dirt and dust that could potentially hurt the fish.

Corydoras Bilineatus does not require specialized lighting, although if you intend to keep live plants in the tank, you may want to utilize light. The illumination should be faint and should not be kept on for more than 12 hours each day.

Corydoras Bilineatus

Corydoras Bilineatus Tankmates

The Corydoras Bilineatus is a calm fish that works well with many other fishes. Some compatible tank mates include:

  • Barbs
  • Danios
  • Gouramis
  • Harlequin
  • Rasboras
  • Kuhli Loaches
  • Mollies
  • Platies
  • Swordtails
  • Tetras
  • Catfish Species

The following fish should be avoided when keeping Corydoras Bilineatus, as they can cause harm or stress:

  • Angelfish
  • Bettas
  • Goldfish
  • Oscars
  • Cichlids
  • Plecos

Different fish need different water conditions, so it's best to keep only the same species together. This will reduce the risk of stress and illness in the fish.

If you're planning to add these fish to a community aquarium, watch them closely to see if they get along with other fish. If they start fighting, be prepared to remove one of them.

Corydoras Bilineatus Diet 

Corydoras Bilineatus is an omnivorous species that will eat both plant and meaty items in the wild. They consume tiny invertebrates, algae, and detritus in the wild. They can be fed a variety of foods in the aquarium, including:

  • Pellets: Flakes are not the only alternative to pellets. They're high in nutrients and available in a variety of forms. Choose a pellet that is suitable for omnivores once again, using caution if you have an issue with your pet eating fish or other seafood.
  • Live food: A good way to provide your fish with added entertainment and exercise is through live food. Brine shrimp, bloodworms, daphnia, and blackworms are all examples of live foods. Live food should not be offered to your fish too frequently since this can lead to intestinal issues. However, in order to stimulate spawning, live food is necessary during the breeding process.
  • Frozen food: Frozen food is an excellent substitute for live food. It is typically more nutritious and less likely to include parasites than live food. Brine shrimp, bloodworms, and daphnia are some great options.
  • Algae Wafers: Algae wafers are an ideal source of nutrition for Corydoras Bilineatus. They contain spirulina, a type of algae rich in vitamins and minerals, which also helps control the growth of algae and keep the tank clean.
  • Vegetable matter: Although not necessary, some fish breeders like to give their fry a diet that consists of small amounts of vegetables. These can be given fresh, frozen or freeze-dried; good examples include spinach, cabbage, and zucchini. If you do choose to feed your fry vegetables, it's important to blanch them before doing so in order to make sure they're easy for the little ones to digest. Additionally, cut the vegetables into small pieces so there is no risk of choking.

Corydoras Bilineatus should be fed 2-3 times a day. The quantity of food they consume will be determined by their size and level of activity. Make careful to keep an eye on your fish and only feed them enough that they can finish in a few minutes. However, overfeeding may result in water quality issues and is harmful to your fish.

Remove any uneaten food from the tank after feeding time is over to prevent water quality issues.

Corydoras Bilineatus

Corydoras Bilineatus Diseases

Corydoras Bilineatus is a hardy fish and does not succumb to disease often. However, there are a few diseases that this fish is susceptible to, including:

  • Ich: Ich is a disease that affects freshwater fish. As a result of this parasitic infestation, white spots will appear on the fish's body. The main reason for this is the water quality. To cure ich, your tank's temperature should be raised to 86°F and a salt treatment administered. You'll also need to clean the gravel on a regular basis and vacuum any parasites out of it using a net.
  • Fin Rot: Fish usually experience fin rot during their lifetime. It's an illness caused by bacteria, which makes the fins look like they're deteriorating. If your cory catfish's fins are frayed, it probably has fin rot. Don't worry though! The treatment is simple and over-the-counter medicines work well. Just check the pH balance of the water in your aquarium to ensure that it's correct first. Poor water quality is often times the root cause for fish getting sick since germs can grow unchecked in tanks.
  • Dropsy: Dropsy refers to the enlargement of a fish's body due to the accumulation of fluids. This disease is often fatal but can be treated with antibiotics if caught early enough. The first thing you need to do is check your water quality. If everything looks good there, then it's time to treat the fish with antibiotics.
  • Gill Flukes: Gill flukes are parasites that attach to a fish's gills and cause irritation. These small, squid-like creatures have tentacles that inflame the gills. If your fish has gill flukes, it will need medication for parasites. The gravel should be vacuumed and water changes performed on a regular basis to remove any infestations hiding there.
  • Popeye: Fish owners should be aware of Popeye disease, which is a condition that affects fish. The eyes of a fish suffering from this condition will appear to bulge. This is a bacterial infection known as Popeye disease that causes it. In rare cases, some fish lose an eye as a result of the illness's severe consequences. Popeye sickness is very easy to cure. Penicillin ointment may be used to alleviate the condition simply enough. There are many things you can do with your time on earth, and fishing isn't one of them!


Corydoras Bilineatus, like all other fish, can get sick. The most common symptoms are:

  • White spots on the body
  • Frayed fins
  • Enlarged body
  • Bulging eyes
  • Irritated gills
  • Loss of appetite
  • Lethargy
  • Hiding
  • Swimming erratically
  • Surface breathing

If you notice any of these symptoms in your fish, it's important to take them to the vet as soon as possible for a diagnosis and treatment plan. Early detection and intervention is key to a successful outcome!


The most important thing you can do for your fish is to keep the water quality high. This means performing regular water changes and vacuuming the gravel on a regular basis. You should also treat the fish with antibiotics if they become sick. Some common treatments include:

  • Penicillin ointment
  • Antibiotics
  • Salt treatment
  • Raising the tank's temperature
  • Vacuuming the gravel
  • Cleaning the tank on a regular basis
  • Checking the pH balance of the water
  • Feeding the fish a high-quality diet
  • Giving the fish plenty of hiding places
  • Quarantining new fish before adding them to the tank

If you follow these simple tips, your fish will have a much higher chance of staying healthy and happy. However, if you find your fish sick, it is best to consult an expert before taking the necessary steps.

Corydoras Bilineatus Breeding

Corydoras Bilineatus is a popular species among Corydoras hobbyists. It's simple to raise Corydoras Bilineatus in your own aquarium. The following guide will show you how to successfully breed Corydoras Bilineatus.

Choose a Breeding Pair of Corydoras Bilineatus 

Corydoras Bilineatus make great breeding pairs if they are healthy, active, and of a similar size.

You can find healthy and active fish by visiting your local Fish store and asking the staff for help in picking out a good pair. After you have chosen them, bring them home and quarantine them temporarily in a different tank.

Condition The Breeding Pair

Once you have chosen a breeding pair of Corydoras Bilineatus, you will need to condition them for breeding. The best way to do this is to feed them a high-quality diet and make sure they are getting plenty of exercise.

You can condition your fish by giving them live foods such as brine shrimp or daphnia. You should also add some plants to the tank for the fish to hide in. Rising the temperature of the water to about 82 degrees Fahrenheit will also help to trigger spawning.

Breeding Tank Setup

After you have conditioned your breeding pair of Corydoras Bilineatus, it's time to set up the breeding tank.

The breeding tank should be at least 20 gallons in size and should have a water heater set to 82 degrees Fahrenheit. The tank should also have a sponge filter and plenty of live plants.

You can use any type of live plant, but java moss is a good option because it's easy to care for and the fish like to hide in it.

Make sure that the water is free from ammonia and nitrites. You can achieve this by performing regular water changes.


When your fish are ready to spawn, you will see them swimming close to each other and rubbing their bodies against each other. The female will then lay her eggs on a plant or piece of driftwood. After she has laid her eggs, the male will fertilize them.

The female Corydoras Bilineatus can lay up to 100 eggs at a time. Once the eggs have been fertilized, they will hatch in about 5-7 days.

Caring for the Corydoras Bilineatus Fry 

After the fry has hatched, you will need to remove them from the breeding tank and raise them in a separate tank. The fry tank should be at least 10 gallons in size and should have a water heater set to 82 degrees Fahrenheit.

You can feed the fry live foods such as brine shrimp or daphnia. You should also add some plants to the tank for the fry to hide in. Regular water changes are also important to keep the fry healthy.

As the fry grows, you can start to feed them pellets or flake food. You should continue to perform regular water changes and add plants to the tank.

By following these simple tips, you can successfully breed Corydoras Bilineatus.

Corydoras Bilineatus

Frequent Questions

How big do Corydoras Bilineatus get? 

Corydoras Bilineatus can grow to be about 2.5 inches in length. However, this can vary depending on the conditions of their environment and their diet.

How many Corydoras Bilineatus are in a 10-gallon?

A 10-gallon tank can comfortably hold about 5 Corydoras Bilineatus. If you have a larger tank, you can add more fish. Just make sure to keep an eye on the water quality and perform regular water changes.

What do Corydoras Bilineatus eat?

Corydoras Bilineatus are omnivores, so they will eat a variety of foods. They should have a diet that consists of both live and frozen foods, as well as pellets and flake food. You can also add some vegetables to their diets, such as zucchini or broccoli.

Do Corydoras Bilineatus need a filter?

Corydoras Bilineatus do not need a filter, but it is recommended that you use one. A filter will help to keep the water quality high and will make it easier to perform regular water changes.

Do Corydoras Bilineatus need a heater? 

while you don't need to use a heater for your Corydoras Bilineatus, it is recommended. A heater will maintain the water temperature more consistently, and that's better for the health of your fish.

How often do Corydoras Bilineatus need to be fed?

Corydoras Bilineatus should be fed 2-3 times per day. You can feed them live foods, frozen foods, pellets, or flakes. You should also add some vegetables to their diet.

Are Corydoras Bilineatus peaceful?

Corydoras Bilineatus are peaceful fish. They can be kept with a variety of other fish, as long as the other fish are also peaceful. Observing their tankmates is the best way to ensure that everyone gets along.

Do Corydoras Bilineatus need a saltwater tank?

Corydoras Bilineatus do not need a saltwater tank. They can live in both freshwater and saltwater tanks. However, it is important to acclimate them slowly if you are moving them from freshwater to saltwater tanks.


Corydoras Bilineatus is a peaceful and hardy fish that make a great addition to any aquarium. They have beautiful silver-white lines that run down their pigmented bodies and long barbels that help them to find food. These species of fish are easy to care for, and they can live in both freshwater and saltwater tanks. Even though Corydoras Bilineatus are peaceful species, they should still be provided with hiding places and plenty of swimming space. They prefer to eat live and frozen foods, but they will also eat pellets or flakes. So, if you are looking for a beautiful and easy-to-care-for fish, the Corydoras Bilineatus is a great choice!

Sarah Robertson

I am a passionate blogger who also happens to be a fish keeping enthusiast. Writing about my hobby is something that I absolutely love to do, and it's no secret that my chosen topic is always centered around fish keeping.

Sarah Robertson

{"email":"Email address invalid","url":"Website address invalid","required":"Required field missing"}

Subscribe to our newsletter