Julii Corydoras Care, Size, Longevity, Tankmates and More! (2023)

Origin, appearance, size and shelf life

Julii Corydoras, or Corydoras julii, also known as Leopard Cory, is originally a popular freshwater fishfrom the Amazon basin in South America. You can usually find them in the tributaries of rivers in Brazil and Peru.

In the wild, Julii Corydoras are most often found in calm, slow-moving waters with abundant vegetation. These plants not only serve as shelter, but also as a source of food, while sandy or gravelly riverbeds provide a perfect substrate for their benthic life. These social fish thrive in groups of at least six, but it is not uncommon to see them in larger groups.

Their natural environment consists of warm, slightly soft and slightly acidic water. The temperature is usually between 72 and 79 degrees Fahrenheit (22 to 26 degrees Celsius), with a pH of 6.0 to 8.0 and water hardness between 2 and 12 dGH. To create a similar environment in your aquarium, be sure to maintain a consistent water temperature, use a top-quality filtration system, and include live plants and hiding places.

By accurately reflecting the Julii Corydoras natural habitat and providing the right water conditions, you prepare your fish for a healthy and happy life in your aquarium.

Julii Corydoras are admired for their intricate markings, which can vary in appearance from fine spots to more reticulated patterns. These beautiful markings make them an attractive and eye-catching addition to aquariums. Although they are small,to about 2.5 inches (6.4 cm) in size, their unique designs and soft nature make them an ideal choice for those looking for a charming and peaceful waterscape. These attractive fish captivate observers as they forage on the bottom of the tank, making them a firm favorite among hobbyists of all experience levels.

With proper care,Julii Corydoras can have a lifespan of up to 5 to 7 years. As social creatures, they thrive in groups and are best kept in schools of at least six individuals.To promote their welfare and ensure a long lifespan in captivity, it is essential to provide a sand or fine gravel bottom, a well-planted aquarium with adequate hiding places and a varied diet consisting of high-quality pellets, flakes and frozen food .

fun facts

Now that we have learned more about the appearance and life span of Julii Corydoras, in this section we will highlight some fascinating facts about these charming fish that make them stand out in the aquarium hobby. From their unique patterns to their social behavior, Julii Corydoras are full of surprises and are sure to captivate any aquarium.

  • Mimicry for survival:In the wild, Julii Corydoras often swim alongside other Corydoras species, which they look similar to. This mimicry helps both species increase their numbers and confuse predators, increasing their chances of survival.
  • Rays to detect:Julii Corydoras have a pair of sensory spikes near their mouths that help them navigate their environment and forage on the substrate. These rods are a characteristic feature of all Corydoras species.
  • Breathing from the surface:Julii Corydoras have a unique ability to suck air from the surface of the water and extract oxygen through their guts. This adaptation allows them to survive in low-oxygen environments, which are common in their natural environment.
  • Ability to change colors:Julii Corydoras can change the intensity of their colors based on their environment, mood or health. In low light or stress, their colors may appear less vibrant. Conversely, when they feel safe and unharmed, their colors become more vibrant, making them stand out in an aquarium environment.
  • School Behavior:Julii Corydoras are schooling fish, meaning they prefer to swim together in groups. This behavior not only helps them feel safe, but also creates a harmonious visual appearance in an aquarium. Their coordinated movements and beautiful patterns can transform a home aquarium into a magical underwater scene.

Now that you've discovered some interesting facts about Julii Corydoras, you'll be able to better appreciate their beauty and intricacies in your tank. In the next section, we provide recommendations on tank setups so that Julii Corydoras have an ideal environment to thrive and display their charming characteristics.

Recommended tank settings

Each setup includes the essential components - tank, filter, heater, lighting, substrate and more - to ensure you can create a suitable environment for Julii Corydoras and other compatible freshwater fish species in your aquarium. As you move from budget-friendly to premium settings, you also have more options for customization, aesthetics, and advanced features. Julii Corydoras are social fish and should be kept in groups of at least six for their well-being. Typically, Julii Corydoras go for between $3 and $6 per fish, although prices can vary based on factors such as size, quality, and availability.

Budget-friendly setup (around $200):


  • Tank:20-gallon aquarium with hood or glass cover ($40-$70)
  • Filter:Hung On Back (HOB) or Sponge Filter rated 20 gallons ($20 - $40)
  • Heating:50-100 Watt Adjustable Aquarium Heater ($15-30)
  • Relief:Basic LED Aquarium Light ($20 - $50)
  • Substrate:Inexpensive aquarium sand or small gravel ($10 - $20)
  • Decor:A few bits of driftwood and rocks, along with inexpensive live plants like Java Fern and Anubias ($20-$40)
  • Vis:Low Prices July 6 ($18-$36)
  • Thermometer:$ 3 - $ 10
  • Substrate Blank:$ 10 - $ 25
  • withered:$ 2 - $ 10
  • Algae scraper of the magnetic cleaner:$ 5 - $ 20
  • Siphon and bucket:$ 15 - $ 30
  • test kit:$ 15 - $ 50
  • Seafood:$ 5 - $ 20
  • Air conditioner:$ 5 - $ 15

Mid-range setup (around $400 - $650):

  • Tank:20-30 gallon aquarium with hood or glass cover ($60 - $120)
  • Filter:Canister filter or high quality HOB filter suitable for tank size ($60 - $150)
  • Heating:100-150 Watt Adjustable Aquarium Heater ($25-50)
  • Relief:LED aquarium lighting with adjustable plant growth and color enhancement settings ($50-$150)
  • Substrate:Nutrient-rich aquarium substrate designed for planted tanks ($20-$40)
  • Decor:A mix of driftwood, rocks and live plants such as Amazon swords, Java Fern species, Anubias and Cryptocoryne ($40-$80)
  • Vis:Low Prices July 6 ($18-$36)
  • Thermometer:$ 3 - $ 10
  • Substrate Blank:$ 10 - $ 25
  • withered:$ 2 - $ 10
  • Algae scraper of the magnetic cleaner:$ 5 - $ 20
  • Siphon and bucket:$ 15 - $ 30
  • test kit:$ 15 - $ 50
  • Seafood:$ 5 - $ 20
  • Air conditioner:$ 5 - $ 15

High-end setup (over $800):

  • Tank:30-40 Gallon Rimless Aquarium with Glass Cover ($120 - $250)
  • Filter:High quality canister filter suitable for tank size ($100-$250)
  • Heating:Adjustable 150-200 Watt Aquarium Heater with External Temperature Controller ($40-80)
  • Relief:Advanced LED lighting system with adjustable settings for plant growth, color enhancement and day/night cycles ($150 - $300)
  • Substrate:Premium aquarium substrate designed for planted tanks, with additional root tabs for extra plant nutrition ($30-$60)
  • Decor:A combination of driftwood, rocks and live plants to create a natural waterscape, with plant species such as Amazon Swords, Java Fern, Anubias, Cryptocoryne species and carpet plants such as Dwarf Hairgrass or Monte Carlo ($60-$150)
  • Vis:Low Prices July 6 ($18-$36)
  • Thermometer:$ 3 - $ 10
  • Substrate Blank:$ 10 - $ 25
  • withered:$ 2 - $ 10
  • Algae scraper of the magnetic cleaner:$ 5 - $ 20
  • Siphon and bucket:$ 15 - $ 30
  • test kit:$ 15 - $ 50
  • Seafood:$ 5 - $ 20
  • Air conditioner:$ 5 - $ 15

Please note that these numbers are only recommendations and you should consider other factors such as mates and individual fish personalities when deciding how many Julii Corydoras to keep in your tank. Prices may vary by location, brand and availability.

Set up your tank

In the previous section, we discussed recommended aquarium setups for Julii Corydoras and other fish. Now that you have a better understanding of what is required, let's take a look at the step-by-step process of setting up your aquarium. These steps will help you choose the ideal location for your aquarium, clean and prepare the aquarium, install the necessary equipment, and circulate the water to create a healthy environment for your fish. We also cover the proper acclimatization process to ensure a smooth transition for Julii Corydoras and other fish in their new homes. By following these guidelines, you'll be well on your way to creating a thriving aquatic ecosystem for your fish to thrive.

  • Step 1:Choose the perfect spot for your aquarium and make sure it is away from direct sunlight, heat sources and drafts. Make sure the surface is flat and stable enough to support your full container. If your aquarium requires a stand, assemble it according to the manufacturer's instructions and place the empty tank on top.
  • Step 2:Then clean the tank by rinsing it with clean water (avoid using soap or chemicals) to remove any dust or dirt. Wipe the interior with a clean cloth or paper towel. Rinse the substrate (sand or gravel) thoroughly in a bucket until the water runs clear, then spread it evenly across the bottom of the tank, creating a slight slope back for visual depth.
  • Step 3:Before filling the tank with water, plan your aquarium layout, including the location of equipment such as heaters and filters. This makes it easier to set up and maintain the tank in the long run. Install the heater and filter according to the manufacturer's instructions. If using a sponge or gravel filter, place it under the substrate before adding water.
  • Step 4:Decorate the aquarium with driftwood, rocks and plants to create hiding places and a visually appealing environment, providing open swimming areas for your fish. When decorating the tank, be sure to arrange driftwood, rocks and plants so that they do not damage or interfere with the equipment. You can also anchor plants to driftwood or rocks to keep them in place.
  • Step #5:Fill the tank with water treated with a water conditioner if your tap water contains chlorine or chloramines. Place a clean plate or plastic bag on the substrate to avoid disturbance during filling. Fill the tank until it is about 2/3 full. Attach the aquarium lighting to the hood or canopy according to the manufacturer's instructions. Consider using a timer for your aquarium lighting to maintain a consistent day-night cycle, which is essential for fish and plants. Connect the heater, filter and any additional equipment (air pump, CO2 system) to power sources and install the thermometer in a conspicuous place.
  • Step #6:Top up the water, leaving space between the surface of the water and the top of the tank for oxygen exchange. Turn on the filter, heater and other equipment. Monitor the water temperature and adjust the heating if necessary. Circulate the tank for 4-6 weeks to establish beneficial bacteria and stabilize water parameters. During the cycling process, you can add a bacterial starter culture to speed up the establishment of beneficial bacteria in the tank. Use an aquarium test kit to check ammonia, nitrite and nitrate levels.
  • Step #7:After the tank has been cycled and the water parameters are stable, slowly acclimate Julii Corydoras and other fish to the tank conditions before introducing them. Start by floating the unopened bag of fish in the tank for 15-20 minutes to allow the temperature to equalize. After that, open the bag and add a small amount of tank water to it. Continue adding small amounts of water from the tank to the bag every 5-10 minutes for at least 30-60 minutes to allow the fish to gradually adjust to the new water chemistry. Use a net to gently transfer the fish from the bag to the tank, avoiding undue stress or exposure to water from the bag.
  • Step #8:Once all the fish have spawned, establish a consistent daily feeding schedule, ensuring high quality food in the right amounts for your fish species. Perform regular water changes (20-30% every 1-2 weeks) and monitor water parameters using a test kit to maintain a healthy environment for your fish. Watch your fish closely for signs of stress or illness, especially during the first few weeks after introduction. Be prepared to take action if necessary, such as adjusting water parameters or seeking advice from an experienced aquarist.

By following this step-by-step guide and incorporating the additional setup tips, you can create a thriving aquatic environment that will help Julii Corydoras and other fish thrive in their new homes.

Recommended water parameters

To maintain a healthy and thriving environment for Julii Corydoras, it is important to maintain certain water parameters in your aquarium. Here's a list of ideal parameters to aim for:

  • Temperature:Keep water between 22°C and 26°C (72°F and 78°F) for optimal comfort.
  • pH:Aim for a slightly acidic to neutral pH of 6.0 to 7.5, making sure the changes are gradual.
  • Hardness:Soft to moderately hard water (3-12 dGH) is ideal, although they can adapt to slightly harder water.
  • Ammonia, nitrites and nitrates:Keep ammonia and nitrite levels at 0 ppm and keep nitrate levels below 20 ppm.
  • Relief:Provide moderate lighting with shady areas and plants to avoid stress.
  • Water movement:A gentle current of water is preferred, mimicking their natural calm habitat.

Check your aquarium water regularly and perform necessary water changes to keep the environment stable.

(Video) Corydoras Julii catfish - underrated clean-up crew?

Routine water maintenance

Water changes are essential for a healthy Julii Corydoras tank as they help remove excess nutrients, waste and toxins. Here's a suggested routine:

  • Weekly water changes:Replace 20-25% of the tank water weekly.
  • Water parameters test:Check pH, ammonia, nitrite, nitrate and hardness regularly.
  • Use a gravel vac:Clean the substrate during water changes.
  • Dechlorinate the water:Treat tap water with a conditioner before adding it to the aquarium.
  • Temperature and pH adjustment:Make sure the new water is similar to the tank water.
  • Screw conditioner:Give your fish time to adjust to the new conditions after a water change.

In addition to regular water maintenance, consider the following to ensure the health of your fish and the overall appearance of your tank:

  • Duration of lighting monitoring:Monitor how long your aquarium lights are on each day and aim for a consistent photoperiod of 8-10 hours. Too much light can lead to unwanted algae growth.
  • Factory Maintenance:Trim live plants regularly to maintain their health and appearance. Remove any dead leaves or plant material to avoid water quality problems.
  • Filter Maintenance:Clean or replace the filter media as recommended by the manufacturer, usually every 4-6 weeks. Do not replace all filter media at once, as this can disrupt the beneficial bacteria and cause water quality problems.

Diet and nutrition chart

Julii Corydoras are omnivores and need a varied diet. Here are some dietary guidelines:

  • Immersion pellets:Use a high-quality pellet food designed for bottom-dwelling fish.
  • Frozen and live foods:Occasionally offer bloodworms, brine shrimp, daphnia or tubifex worms.
  • Vegetable matter:Provide blanched spinach, zucchini or cucumber for extra nutrients.
  • Power Frequency:Feed small portions once or twice a day, avoid overfeeding.

Connectionand diseases

Julii Corydoras can experience stress from a variety of sources, including poor water quality, aggression, or inappropriate aquarium conditions. Identifying and dealing with these stressors is essential to the health and well-being of your fish:

  • Pay attention to stress signals:Watch Julii Corydoras for unusual behaviors such as hiding, lethargy, or rapid breathing, which may indicate stress.
  • Check water quality:Test your aquarium water to make sure it meets the ideal parameters and do regular water changes to maintain a healthy environment.
  • Watch out for your tank mates:Be sure to check out Julii Corydoras
    Corydoras are not harassed or attacked by other fish and remove aggressive companions if necessary.
  • Create a suitable habitat:Provide plenty of hiding places, proper lighting, and an appropriately sized aquarium for your fish.

Although Julii Corydoras are generally hardy, they can be susceptible to some common fish diseases, including:

  • I (white spot disease):A common parasitic infection that causes white spots on the body and fins, lethargy and loss of appetite. Treat Ich with aquarium salt or antiparasitic medicine and raise the water temperature to about 82°F (28°C).
  • rotten end:A bacterial infection that results in frayed or discolored fins and tail. Treat fin rot with partial water changes, aquarium salt, and an antibacterial medication containing erythromycin or tetracycline.
  • Velvet disease:A parasitic infection that causes a yellow or brown velvety coating on the body of the fish. Treat velvet disease with antiparasitic drugs containing copper sulfate or formalin.

Prevent disease in Julii Corydoras by maintaining excellent water quality, avoiding overfeeding and providing a balanced diet. Quarantine new fish before adding them to the main tank and treat any signs of illness immediately.


Growing Julii Corydoras is relatively easy and can be a rewarding experience for hobbyists. Follow these steps to breed Julii Corydoras:

  • Step 1:Set up a separate breeding tank of 10 gallons or larger with a pH of about 6.5 to 7.0 and a temperature of about 24°C. Provide soft water (3-12 dGH) and provide hiding places such as plants and spawning mops for fish comfort.
  • Step 2:Select healthy, mature male and female Julii Corydoras for breeding. You can determine the gender by observing their physical characteristics and behavior.
  • Step 3:Prepare the breeding pair with a high-protein diet of live or frozen foods for several weeks to help them gain strength and energy.
  • Step 4:Stimulate spawning by introducing the pair to the breeding tank and dimming the lighting. Female Julii Corydoras lay sticky eggs on plant surfaces, breeding mops, or tank glass.
  • Step #5:Care for the eggs by removing the breeding pair after spawning. The eggs hatch in 3-5 days and the fry will be free swimming after a few days. Feed them first with infusoria or liquid fry food, then gradually introduce ground flake food.
  • Step #6:Monitor brood growth and development and separate them by size if necessary to prevent larger brood from preying on smaller ones.

Cultivating Julii Corydoras can be a rewarding experience for fish lovers. Patience and the right conditions are the key to success.

Recommended tankmates

Here are the top 10 recommended teammates for Julii Corydoras:

  1. Dwarf cichlids
  2. Neon Tetra's
  3. Ax
  4. Molly's
  5. Bristlenose plecos
  6. Cardinal Tetras
  7. Cherry shrimp
  8. Nerites snails
  9. of Rashbor
  10. Otocinclus catfish

Remember to avoid large, aggressive fish such as cichlids, angelfish and predatory species as they can harm or eat Julii Corydoras. Always observe the behavior of the new fish and make sure they do not cause stress or aggression to the Julii Corydoras.

(Video) Cory Catfish Care Guide - Aquarium Co-Op


In summary, Julii Corydoras are an attractive species of freshwater fish known for their unique markings and ease of care. These fish require specific water parameters, a balanced diet and a suitable environment to thrive in captivity. However, under the right conditions, they can live up to 5 years and make a great addition to any aquarium. When choosing mates, it is important to choose peaceful and non-aggressive species to ensure a harmonious community. Cultivating Julii Corydoras can be a simple but rewarding experience for experienced hobbyists, and patience and ideal conditions are the keys to success. Overall, Julii Corydoras are a charming and active species that can enhance any aquatic display with their distinctive appearance and lively behavior.

Frequent questions

What is the ideal tank size for Julii Corydoras?

When creating a home for Julii Corydoras, a 20 gallon tank is the minimum recommended size for a small group. Choosing a larger tank is even better as it helps maintain consistent water conditions while also providing plenty of room for your fish to swim around.

How many Julii Corydoras should be kept together?

Note that Julii Corydoras are schooling fish, meaning they thrive in groups of at least 6 individuals. Keeping a larger group not only helps your fish feel safer, but also encourages them to display their fascinating natural behaviors.

What water parameters does Julii Corydoras need?

Julii Corydoras thrive in water temperatures between 72°F and 78°F (22°C and 26°C), pH between 6.0 and 7.5, and soft to moderately hard water with hardness between 2 and 15 dGH.

What does Julii Corydoras eat?

(Video) Everything You Should Know Before You Get Corydoras! 7 Tips for Keeping Corydoras in an Aquarium!

Julii Corydoras are omnivores and need a varied diet. Feed them a high-quality pellet food mix, along with live or frozen foods such as daphnia, brine shrimp and bloodworms.

Are Julii Corydoras compatible with other fish?

Yes, Julii Corydoras are generally peaceful and can coexist with other non-aggressive fish species of a similar size. Ideal tank mates are small tetras, rasboras, dwarf cichlids and small plecos.

How Long Do Julii Corydoras Live?

With proper care and optimal tank conditions, Julii Corydoras can live 3 to 5 years.

How do I grow Julii Corydoras?

Julii Corydoras is relatively easy to grow. Using a separate breeding tank, prepare the breeding pair with a high-protein diet and introduce it into the breeding tank. The female lays adhesive eggs on surfaces, which hatch in 3-5 days.

Do Julii Corydoras need a planted aquarium?

Although not absolutely necessary, a planted tank is highly recommended for Julii Corydoras. Live plants provide hiding places, improve water quality and create a more natural environment that closely resembles their native habitat.

Can Julii Corydoras change color?

Julii Corydoras can actually undergo color changes due to various factors such as stress, disease or changes in water conditions. If you see that your Julii Corydoras are showing color loss, it is important to examine the water parameters and closely monitor their health.

(Video) 7 Tips for Keeping Corydoras in an Aquarium


How many Julii Cory catfish should be kept together? ›

As a relatively small fish, they crave safety in numbers, so a group of six corydoras or more (all of the same species) is highly suggested. These peaceful bottom dwellers can be kept with pretty much any community fish that won't eat or attack them.

What size aquarium for corydoras julii? ›

Tank LevelBottom dweller
Minimum Tank Size10 gallon
DietOmnivore, eats all foods
BreedingEgg layer
6 more rows
May 18, 2022

What is the lifespan of a corydoras julii? ›

Size of fish - inches: 2.0 inches (5.08 cm) - Females tend to be larger than males. Lifespan: 5 years - They can live for 5 years or longer with optimal conditions.

Are Julii Cory catfish hardy? ›

Corys are hardy fish for their size and are staples in freshwater community tanks. Cory Catfish are often described as armored catfish, due to their plates of bone-like material running the length of their bodies.

Can you keep 3 cory catfish in a 5 gallon tank? ›

In a 5 gallon tank, no Cory Catfish should be housed. Since a group of at least 6 is necessary for them to feel good, a five-gallon is too small to house a small group.

Can you have too many Corydoras? ›

Double-check your water parameters and make sure your tank is not overcrowded. Remember, you should not keep more than 6 cory catfish in a 10-gallon tank, and if you want to add tank mates, you may need to reduce the school to only 4 fish.

Can Betta live with Julii Cory catfish? ›

This might make you think both can't live together, but luckily that isn't the case! Keeping betta fish and cory catfish is certainly possible: Cory catfish and betta fish make great tank mates.

What is the perfect corydora tank? ›

Housing Recommendations for Corydoras

A 30-gallon aquarium is best for most species, although pygmy Corys such as C. hastatus, C. habrosus and C. pygmaeus can be kept in smaller aquariums.

How many Corydoras in a 20 gallon long? ›

In a 20-gallon tank, you can generally keep between eight and 10 Cory catfish, depending on the species of Corydoras you choose and what tank mates you want to keep with them. Of course, if you opt to keep smaller species, such as dwarf or Pygmy corydoras, you can keep up to 14 individuals if you want to.

What is the most hardy Corydoras? ›

1. Sterbai cory (Corydoras sterbai) In terms of popularity, this is the cory that everyone gravitates towards because of their famous polka-dotted, striped pattern and orange fins. They are great tank mates for most community aquariums and are often kept with discus because of their tolerance for higher temperatures.

Why are all my Corydoras dying? ›

Diseases / parasites

This is by far the most likely reason for your cory catfish to die. Diseases come in many forms and there are a lot of parasites known in the aquarium hobby.

Do Corydoras live in gravel? ›

The popular belief regarding aquarium gravel with cory catfish is that is causes cory catfish barbels to erode and die off. This is a myth, and although cory catfish love playing in sand, sharp gravel isn't the main cause of barbel erosion. Bad water quality or stress is.

What fish do Cory Catfish not get along with? ›

Cory catfish themselves are fish that love to be on their own and mind their own business. They will never search for trouble, but this means they also like to be left alone. They don't do well with intrusive fish and certainly not with aggressive fish like certain cichlids, oscars, …

Do Cory Catfish like lots of plants? ›

Corydoras love plants in their aquarium as they provide natural cover, improve the water quality and are beautiful to look at.

What fish can live with a Cory Catfish? ›

Cory Catfish Tank Mates
  • Serpae Tetra.
  • Neon Tetra.
  • Harlequin Rasbora.
  • Nerite Snail.
  • Swordtail Fish.
  • Otocinclus Catfish.
  • Cherry Barb.
  • Fancy Guppy.

Can I keep cherry shrimp and cory catfish? ›

Cory catfish and shrimp make great tank mates. Unlike popular belief, cory catfish don't eat shrimp. They might eat small shrimplets by accident, but this is very rare. Three great shrimp to keep with cory catfish are cherry shrimp, crystal red shrimp, and Amano shrimp.

Is it normal for Corydoras to swim all over the tank? ›

It's a quite common sight: cory catfish swimming up and down their tank to the surface. If you don't have a lot of experience with cory catfish, this might seem concerning. It's normal for cory catfish to swim up and down their tank.

How many Corys in a 10 gallon? ›

The minimum tank size that one Cory requires to live comfortably is 2 gallons. But as mentioned earlier, these are schooling fish and will feel comfortable in a group of five to six. The rule of the thumb is having 2 or 3 gallons of water for one fish. Ideally, you will need at least 10 gallons for five to six fish.

Do cory catfish clean the tank? ›

Known for their peaceful and entertaining nature, corydoras catfish are favored among both beginning and advanced aquarists. But these energetic bottom dwellers are also workhorses when it comes to cleaning uneaten fish food from aquarium substrate, which helps to maintain water quality.

What is the best substrate for Cory cats? ›

Corydoras like to root around in the substrate for food. So what should we use in the aquarium to allow them to behave naturally, without damage to their barbels? Heiko Bleher explains. I strongly suggest only fine silica sand, ideally white or beige, but never black or any other colour.

Do cory catfish produce a lot of ammonia? ›

Yes, cory catfish do produce a lot of waste. Cory catfish, like all fish, release ammonia and other nitrogenous compounds in their waste, which can have a large detrimental impact on the water quality in an aquarium.

Can you keep 4 cory catfish together? ›

Corydoras Behavior/Compatibility

Corydoras, Brochis and Aspidoras species are shoaling fish, meaning they like to hang out together. Different species can be mixed, and they will often group together. For best results, they should be purchased in groups of 5 or more.

How many Julii Cory catfish can you have in a 20-gallon tank? ›

In a 20-gallon tank, you can generally keep between eight and 10 Cory catfish, depending on the species of Corydoras you choose and what tank mates you want to keep with them. Of course, if you opt to keep smaller species, such as dwarf or Pygmy corydoras, you can keep up to 14 individuals if you want to.

Can I keep 5 Corydoras? ›

Yes you can. Provided you keep the water clean and feed them a variety of different foods.

How many cory catfish can you have in a 5 gallon tank? ›

If you are talking about two Corydoras catfishes, especially if they are of one of the smaller species of Corydoras, would work fine. Five gallons is a bit small, so you will have to monitor the water and avoid the buildup of ammonia or other waste products, but it should work fine.


1. Corydoras Catfish Care!
(Jill's Fish Room)
2. Top 10 Cory Catfish for Your Aquarium
(Aquarium Co-Op)
3. Panda Cory Catfish Care: A GREAT Addition to a Community Aquarium!
(Prime Time Aquatics)
4. Want a Tiny Cory Catfish? Check Out the Pygmy Cory Cat: Care and Breeding
(Prime Time Aquatics)
5. WHAT DO I DO?? MY Corydoras Cory Cats LAID EGGS!!
(LRB Aquatics -Aquarium Sensei)
6. Albino Corydora's - Species Care Guide
(Aqua Mate)


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