You will have to look for small whitish jelly-like balls in the tank which will probably be with other eggs together. The clutch of eggs will be attached to the walls and decorations and will be easily identifiable. The eggs will be nearly 1. Finding out how many fish fry you are going to get can be really exciting. But this will only be possible if you know how to differentiate between fertilized and unfertilized eggs. You might already know that only the fertilized eggs will hatch to become fry and other ones will stay in the tank with no further development.
The unfertilized eggs will rot after a while and you will have to remove them immediately after to find which ones are unfertilized. Now let me tell you the difference between two eggs. The fertilized Cory Catfish eggs will look slightly beige in color. The light brown or nearly a color of tea eggs are what you should be looking at if you are searching for fertilized Corydoras eggs.
The unfertilized Cory catfish eggs will stay white and will turn more whitish as time passes. But remember if there are too many eggs present in the tank and are colonized together with very less oxygen flow, then even the fertilized ones will develop fungus and turn white. But if the water parameters are ideal and the oxygen flow is adequate, you will start to see two eyes i.
When you start to see the darker spots or two eyes inside the eggs, then get ready to see fry in the tank soon after. Leave behind the white or translucent and plain eggs as those ones are the infertile ones and will do no good in the tank anyway. You might have more questions related to Cory catfish breeding and eggs. Here are some answers to questions you might be wondering about. Well, there are few fish that will breed happily in the fish tank and Corydoras catfish is one of them.
So, yes, Corydoras catfish breed easily in the fish tank until and unless you provide an ideal environment for them. Being an impatient breeder, I always wanted my fish population to increase rapidly in the tank. And hence I got what I wanted when I started breeding Cory catfish. You will end up with 15 to 20 fish fry every time the spawning session comes to an end.
If you are careful enough about the water parameters and living environment, then these fish fry will survive healthily and happily in the tank. Actually, you may know how fish will eat anything that fits in their mouth. But when it comes to a snail, the case will quite the same. Cory catfish females will swim with their fertilized eggs to a flat surface for depositing. They like to place the eggs on something soft like moss.
It is probably best to wait until your corydoras are 12 months old before breeding them. The act of spawning can be extremely stressful for fish if they are not sexually mature. Another reason why breeding your fish prematurely is a bad idea. It is most likely that your male corydoras will be sexually mature between months old, but try and refrain from breeding them this early on.
Make sure your corydoras are at least 2. After all, fish mature at different rates, and size is the best indicator here. If you are an inpatient breeder and want to get your corydoras population up as quickly as possible, you will be glad to know that they are extremely easy to breed.
You may even get between healthy fish from one spawning session. Read Related Article: Breeding Corydoras.
You can breed your corydoras whenever you like as long as you follow the following instructions for preparation. You will have roughly 4 to 5 weeks from when the eggs are laid to when the fry are ready to be moved in with the rest of the family. Please note that brand new tanks can take up to 8 weeks to cycle. Most of the time, with the right tank conditioners, beneficial bacteria, and sufficient equipment it will be a little quicker.
For Your Information: New tank syndrome is when an aquarium has an immature or inadequate filter system. Beneficial bacteria are vital for the fish to ensure ammonia levels are kept low. Cory catfish need a tank that holds approximately 30 gallons of water, even though they are only little fish. Think of it this way, corydoras like to live in schools and can be kept with other fish species and plants.
This requires a lot of tank space, thus having a tank big enough is key to keeping your fish in the best condition. The tricky part about keeping a lot of little fish together in a tank is they like to swim around each other. Larger fish tend to be a little lazier than small fish, something that fishkeepers do not expect at first. The tank may look big enough for your fish, but have a look at how they act in the tank. If they are constantly looking startled and as if they are trying to get away from one another, you should consider a bigger tank.
Corydoras are especially sensitive to temperature changes in the water. Having a reliable heater will ensure your breeding fish are happy.
Eventually, when the eggs are laid and the fry hatch, the water temperature will be even more important. That is how the corydoras feel about sand. Anything other than sand will damage the fish and cause them discomfort.
Having a few well-trimmed plants in the aquarium will make the fry feel safer in their first few days. Transfer the bacteria from the main tank into the new one so you can skip the whole cycling process. Do not get tempted to decorate the new tank because you will sabotage the whole process. How can you condition your Catfish to spawn? Easily — make them happy. Make sure they are stress-free, that they eat good food high in protein, and try adding live food as well.
This will simulate a summer rainfall, which is the season in the wild when Cories breed. It might take up to a few days, and when females lay eggs, they will do it on the walls of the tank and plants. If you went for the second strategy and allowed your Cories to breed in the main tank, now you will have to get the eggs as fast as possible to the new tank. You can do that by using your finger or an old credit card and gently scraping it off the walls. If the eggs are on plants or ornaments, you can take them whole and move them to the new tank.
Also, if you notice any infertile eggs, remove them as they are probably developing fungus and will contaminate the rest. The eggs hatch in 3 to 6 days. For the first few days, they will feed off their egg sack attached to their bodies. Once they start swimming, you should start feeding them the food designed for the fry specifically, such as New Life Spectrum Fry Food.
Once they grow up more, you can switch them to adult fish food. To sum up the settings for a breeding tank and place where the fry will live :. Once the fry has hatched and you have moved the parents back to the main tank, it is time to think about what to feed them and how to raise them in general. They will be very small, so you will have to feed them really small amounts of food. You can feed them small amounts of newly hatched brine shrimp several times per day. If you do not know how to hatch brine shrimp, it is very easy, and you start the process two days after the Cory eggs are incubated.
After a week, you can start feeding the fry with crushed flake food or even with live brine shrimp, if you have them. You can also feed them with daphnia and micro worms. It is also very important to keep the water clean and never overfeed the fry.
Replace it with the water from the main tank. By the time the fry is 3 to 4 weeks old, they are large enough to feed on regular tank food and you also can add a regular hang-on or canister filter without injuring them. Other than the bare aquarium, sponge filter, and heater, not much else is needed for the fry tank. Like we discussed above, try to keep it as simple as possible.
Ideally, you want about 2 males for every female in the aquarium. That said, there are a few things you can look for. Females, on the other hand, are thicker around the midsection and tend to sit higher off the bottom. Instead of stressing out about determining genders right then and there, picking a random group of Cories works just about every time. Well fed Cories are happy Cories — therefore, a high protein, nutritious diet is important in the spawning process.
I prefer to feed small quantities often throughout the day maybe times. That said, make sure not to overdo it — keeping your water parameters in line should always be the 1 priority. After a week or two of conditioning, you will notice your female Cories getting plump with eggs. This is a great sign and signals the perfect time to move on to the next step.
The drop in temperature simulates summer rainfall, which is when Cories breed in the wild. Females usually lay their eggs on the tank wall, but sometime use plants, filters, or decorations instead I have even seen them lay eggs on an Mystery Snail. The first step is getting the eggs out of the main tank — the breeding colony of Cories are hungry after spawning and will usually eat their own eggs. Use you finger, a credit card, or a razor to gently scrape the eggs off of the tank wall into a small container or net.
Be very gentle with this step. Next, transfer the eggs to the fry tank without exposing them to air. If you want something more official than a breeder net, egg tumblers are a great affordable option. They were designed specifically for the purpose of incubating fish eggs and do a great job at deterring fungus. I highly suggest the Cobalt Aquatics Egg Rocker. These eggs are infertile and growing fungus, which can spread to good eggs given enough time. Cory eggs usually hatch in days.
For the first few days, feeding your fry is unnecessary since they absorb nutrients from the egg sack attached to their body. Once the egg sacks are absorbed and the fry are free swimming, start them on New Life Spectrum Fry Food. Your fry should start growing fast once they begin eating. Once they are large enough, switch the fry over to dried brine shrimp or crushed up flakes.
Corydoras are scavengers and do best on a mix of plant and meat based foods. Cory Catfish are a schooling species and should be kept in groups on 5 to 6.
All good info! Only differance Ive found is eggs are very prone to fungus using method of transferring eggs to fry tank. I now always use methal blue and tumbler or air stones in breeder. Also, parents left with fry kept eggs clean no methal blue needed and laid around plants where hatched fry stayed until large enough to keep tank mates from consuming. Great acrobats when happy! Hi Sheri! That is great to hear that you have had success raising and selling Albino Corydoras.
I agree, Methylene Blue can be a huge help to keep eggs from developing fungus! I used to use that a lot back when I was breeding Angelfish.
It does not mean they are infertile. I have added meth blue in the middle of a incubation period because eggs were starting to fungus and everyone of those eggs hatched. Hi We currently have a cory laying eggs in our aquarium. Around 30 so far, that I have seen. Around 15 eggs.
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