When do Cory Catfish eggs hatch

Breeding Corydoras

Corydoras are also known as the Cory Catfish. They are a freshwater fish that is very popular with aquarium lovers around the world. What is particularly appealing about this fish is that they are very social and like to be kept in groups of 6 or 7 of their own species, as well as with other fish breeds. These types of groups of fish are called schools.

When you have a tank full of corydoras, you count yourself very lucky! You can introduce other similar temperament fish into the aquarium without experiencing any problems with your Cory catfish. Indeed, if you have tetras or other similarly colored fish in the tank, the Cory Catfish will playfully swim with them.

Another benefit of having a school of Cory catfish in your aquarium is that they will help keep your tank clean. Corydoras are soil eaters. This means that they spend most of their lives at the bottom of the tank looking for scraps of food and other trash to nibble on. Bottom feeders are generally great tank companions for messy fish and make your life a lot easier when cleaning the tank.

Read the related article: Glow Fish Breeding

Corydoras is the scientific name for Cory Catfish. We will refer to them by both names throughout this article. So don't be confused. Most fish have a scientific name as well as a street name. In this case, the scientific name and street name are used just as often.

Corydora's interesting facts

  1. Female Corydoras are slightly larger than males. They can grow up to 3 inches long while the males reach approximately 2.5 inches.
  2. Adult Cory catfish do not have teeth. You may notice small tooth-like ridges on larvae and young Cory catfish. They soon lose those baby teeth and are left behind as gummy adults.
  3. Cory catfish live a maximum of 5 years. You will only reach this age if you keep her happy and healthy. Don't forget that the happiness of your fish is just as important as their health.
  4. Corydoras cannot get pregnant. They are egg-laying fish, so they do not give birth to live larvae.
  5. Corydoras are not fussy about their food, they eat both plants and meat.
  6. Did you know that Cory Catfish can breathe out water? They have a special labyrinth organ that is vital for land breathing. However, do not keep your Corydoras out of the water for very long as it will be very worrying for them.
  7. They love to eat, but make sure their meal sinks to the bottom of the tank. Cory catfish are a little lazy and would prefer their food to come to them.
  8. There are around 7 types of Corydoras, each with its own pattern and color.
  9. Corydoras like to eat zucchini and pumpkin every now and then.

Where can Corydoras be found in the wild?

Instead, you won't find these fish in the ocean; they are found in ponds, streams, rivers, and swamps. They prefer a slow flow of water. Cory catfish are native to South America. The most important thing for Corydoras is to be in shallow and cloudy water.

Corydoras were discovered by none other than Charles Darwin between 1831 and 1836. Charles Darwin stumbled upon these little fish on his famous 5 year trip on the Beagle. Good job charles!

What makes Corydoras so special?

These fish are so popular because of their relaxed, easy-going nature. They don't ask too much or cause a stir in other species of fish. Cory Wels even make friends with other species of fish.

As we mentioned earlier, they love to feed on the mess and leftovers of other fish, so you don't have to worry about cleaning the substrate too often. Bottom fish are very important when you have a sand or gravel substrate in your tank. This is because they are constantly moving the substrate and filtering the water while they go about their business.

Tanks without bottom fish need to be cleaned and cared for a little more often, especially if there is a sandy bottom in the tank. Sand changes color very quickly and dangerous gas pockets form in the sand if it is not tended by a bottom dweller. Occasionally raking the sand with your hand will slow this process down.

Read the related article: Axolotl Breeding

Corydoras and laying eggs

Corydoras, like many other spawning fish, have a tendency to eat their own eggs. Therefore, it is important to separate the Cory Catfish from the eggs once the eggs have been laid and the spawning session is over. The most important part of caring for the eggs is making sure the adult fish get out of the tank as quickly as possible to prevent the corydoras from eating their fry.

Corydoras also eat their own fish in the wild, this is their way of controlling their population. We're not sure if Corydoras eat eggs they believe are genetically compromised, or if they just do so as a survival instinct.

The roast tank and the breeding tank can be the same. Although Corydoras can spawn in their regular community tank, it's best to move them around so you don't have to handle the eggs.

Make sure the breeding / frying tank is full of cycling before asking your fish to breed. This tank should be as simple as possible, no fancy accessories are required in your breeding tank, as this makes cleaning considerably more difficult.

Hatching Corydoras eggs therefore only takes 3-5 days, the importance of having a breeding tank ready and with the bike. If you're having trouble cycling your tank, use a good water conditioner and beneficial bacteria to speed up the process a little.

Cory Catfish females swim with their fertilized eggs on a flat surface for deposit. They like to lay the eggs on something soft like moss.

When are Corydoras old enough to mate?

It is best to wait until your Corydoras are 12 months old before breeding them. This way you don't waste time breeding fish that are not yet sexually mature.

Spawning can be extremely stressful for fish when they are not sexually mature. Another reason you are breeding your fish prematurely is a bad idea. It is very likely that your male Corydoras will be sexually mature between 6 and 9 months, but try not to breed them this early.

Make sure your Corydoras are at least 2.5 inches long before you start growing them, even if they are 12 months old. After all, fish mature at different rates and size is the best indicator here.

If you're a stationary breeder and want to get your Corydoras population growing as fast as possible, you'll be happy to know that they are extremely easy to grow. You can even get between 15 and 20 healthy fish from one spawning session. Brilliant!

Read the related article: Breeding Corydoras

How often can you breed Corydoras?

You can breed your Corydoras anytime as long as you follow the preparation instructions below.

  1. You must of course pick healthy fish; this may seem like a no-brainer, but sometimes the fish are not in the best condition for breeding. If for any reason you had to treat your fish, I would recommend waiting a few more weeks before starting the breeding process. This is because the drug can render the fish sterile for a short period of time.
  2. Next, you need to reevaluate where your breeding / frying tank should be placed. If it is near a window, you need to take into account that natural light and outside temperatures will affect breeding activities in the aquarium. Try moving the grow tank to a quiet, dark area of ​​the room so that you are in control of the light. (13 hours of soft light a day is perfect)
  3. Put a little hiding place in the tank. This can be something very simple, like a large plant or a cave (broken coconut shells are great for corydoras).
  4. Make sure the tank conditions are optimal. The pH of the water should be between 6 and 8 and the temperature between 75 and 78 degrees Fahrenheit. Make sure you do 50% water changes every day to keep the water clean. The water should be pretreated before it is added to the tank with the fish to avoid "new tank syndrome".
  5. Do not try to breed a pair of Corydoras at time. As mentioned earlier, they are extremely social and won't get in the mood with just a few fish in the tank. Instead, have 3 or 4 females and the same number of males together in the breeding tank and watch the magic happen.

You would like to have a larger aquarium prepared, if you find that your tank is not big enough for other companions, ride your bike and be ready to go when your new fish is ready to be stocked. You have approximately 4 to 5 weeks from the time the eggs are laid to when the brood is ready to be reared with the rest of the family.

Please note that brand new tanks can hold up to 8 weeks of cycling. Nor is it a process that can be accelerated. Most of the time, things can go a little faster with the right tank conditioners, beneficial bacteria, and adequate equipment. Still, prepare for the worst result and you won't get any shocks or hurdles along the way.

For your information: New tank syndrome is when an aquarium has an immature or inadequate filtration system. Beneficial bacteria are vital for the fish to ensure that ammonia levels are kept low. Large water changes can remove the beneficial bacteria and cause the fish to get sick if the replacement water is too "fresh".

Tank conditions for breeding Corydoras

Cory catfish need a tank that will hold roughly 30 gallons of water, even though they are only small fish. Think of it this way: Corydoras like to live in schools and can be kept with other species of fish and plants. This requires a lot of tank space, so having a large enough tank is key to keeping your fish in top condition.

The Hard Part Of Keeping A Lot Of Fishes Together In One Pool They Like To Swim Around Each Other. Larger fish are usually a bit lazy than small fish, which fish keepers do not expect at first.

The tank might look big enough for your fish, but check out how they behave in the tank. If they keep looking scared and trying to get away from each other, consider a bigger tank.

In the breeding tank you will need:

Corydoras are particularly sensitive to temperature changes in the water. Your farmed fish will be satisfied with reliable heating. Eventually, when the eggs are laid and the roasts hatch, the water temperature becomes even more important.

Canister filters are a good choice. You can also use a sponge filter if you want.

If you want to throw in a few live plants, LED lights are a must. It also makes the tank look a lot nicer. The lights will help you identify and fry the eggs if they are hiding there.

Imagine the substrate of the tank as your nice cozy blanket. It's super important to you, right? This is how the Corydoras feel about sand. Anything other than sand can damage the fish and make it uncomfortable. That will certainly not make them breed successfully.

Do not overdo it with the vegetation in your breeding tank. If you have a few well-cut plants in the aquarium, the fry will feel more secure in the first few days. Java moss, crypts, and pennywoods are good plants in your grow tank.

Identify whether your Corydora is male or female

There is no way you can tell the difference between male and female Corydoras when the fish are sexually immature. If you are a Cory Catfish expert, of course.

Wait until the kernels are a year old or 2.5 cm long and watch them in the aquarium. You will find that some look a bit thicker and chunkier in general. These are women. In comparison, the males are super slim and look like younger fish.

Do Corydoras change gender?

Corydoras do not change sex. If they are born male, they will remain male for the rest of their lives, and so do women. Suspected gender changes are entirely due to a false identity.

What to do when Corydoras lays eggs

Once the Corydoras have laid their eggs, remove the adults from the breeding tank and place them back in the population tank. You can either leave the eggs in the breeding tank and care for them there, or you can put the eggs in a frying tank.

Both methods work great, but less experienced catfish breeders should avoid handling eggs altogether as they are very fragile. As long as the breeding tank is rather minimal and clear, the fish in the tank will be very happy as soon as the eggs hatch.

How to take care of Corydora Fry

Once your roasts hatch, they no longer need to be fed for about 23-48 hours while they are still feeding the remaining yolk sac in their stomachs. As soon as you notice that the fry are starting to fidget and giggle more than usual, you will need to feed them twice a day.

Newborns only need powder feed in the first week of life. Once the fry have grown somewhat (after about a week of dry food), you can introduce either live or dead protein. Baby brine shrimp are a delicacy for Cory Catfish. By the 3rd or 4th week of life, you should start feeding them frozen daphnia.

You may find that one or two french fries are not quite as strong as the others, or maybe they are slightly deformed. If you are breeding your fish for your pleasure, it is okay to leave weaker fish with genetic problems. If you want strong fish that will be suitable for breeding in the future, you should separate those weaker fish from the rest.

When your fry are large enough to move into, make sure the tank is large enough to hold all of the fish. If you don't have a large enough tank and don't want a larger tank, give away some fish.

So there you have it. Your complete breeding guide for the Cory Catfish. You can follow these tips for any species of Cory Catfish. We hope you found this information useful. Have fun growing!