Spawing Corydora's
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Rez
Fish Fanatic
It sure is possible, some cories are a bit more difficult to spawn than others. I find that the wild caught ones are definitely harder to spawn than tank-raised ones. I have 6 wild-caught C. Julli and they will not spawn for the world, While my Pandas spawn quite regularly.
Here are my tips to success for spawning and raising cories:
first of all you are going to need the fish, I suggest that you get at least 6 healthy adult fish (this assures that you will more than likely have both males and females), this is especially important if you are getting juvenile fish and they cannot be sexed yet.
Once you have the fish in your aquarium, you should start preparing them for breeding using live or fresh frozen foods such as bloodworm or grindal worms. After your fish have been fattened up and prepared for breeding, do a large water change around 40 to 50% with slightly cooler water, around 3 degrees cooler than the original tank water right before you turn off the tank lights for the night. If you are lucky you might find eggs on the glass, plants, filter, thermometer, etc.
for reference the eggs should look like this:
My corys have a nasty habit of eating the eggs after they lay them so I have had to take the eggs out of the aquarium by hand after they are laid to protect them for the parents. I have a better way of doing this if you are really serious about getting large numbers of fry. I have two aquariums going one 20 gallon home aquarium for the cories while they are not need for spawning purposes and a 10 gallon breeding aquarium. I place the cories that i would like to breed in the 10 gallon aquarium after conditioning them well on the food mentioned above, the 10 gallon I keep bare-bottomed and place several fake broadleaved plastic plants, I do the water change witht he cooler water and I keep the lights off, only turning them on to check for eggs periodically. Once I spot eggs I remove the adults and place an airstone under the eggs to prevent fungus. The breeding aquarium I keep cycled when i am not breeding cories by housing several Endler's live bearers in (of course take those out when breeding the cories, and when the eggs/fry are in the tank). I actually keep a canister filter attatched to the breeding aquarium, but I affix a sponge filter attachment to the filter intake to prevent the little ones from being sucked up into the filter. I keep the canister connected because I had large die-offs when I did not have vigorous filtration in the tank, and it helps to reduce the endless water changes, that should be done if you do not have filtration like I have listed. This may just be due to the fry I raise being pandas and prone to water quality issues.
Once your fry have hatched they will still have a yolk sac located in their belly but it will run out within a day or two so you should already have some live brine shrimp ready to feed. If you use the canister filter, turn it off when you feed the brine shrimp to the fry because the brine shrimp will be sucked into the filter before the fry can eat their fill. You can tell if the fry are eating the brine shrimp because their bellies will turn orange turn the filter back on one the fry all ahve orange bellies to suck up all of the other brine shrimp so they don't foul the water.
Yolk Sac visible in this pic:
Orange Brine Shrimp filled belly in this pic:
Continue this process with small regular water changes until the cories look like miniatures of the parents, this is when i place the fry in with the parents and start the process over or reintroduce the Endler's to the breeding tank.
Time to introduce the young to the rest of the school:
Once you get your cories breeding they will breed every few days or so and as the cories get bigger and older they will produce more eggs to raise. This is just my method i know that there are plenty of variations out there but I have found that this one works the best for me.
Later,
Rez B)
Here are my tips to success for spawning and raising cories:
first of all you are going to need the fish, I suggest that you get at least 6 healthy adult fish (this assures that you will more than likely have both males and females), this is especially important if you are getting juvenile fish and they cannot be sexed yet.
Once you have the fish in your aquarium, you should start preparing them for breeding using live or fresh frozen foods such as bloodworm or grindal worms. After your fish have been fattened up and prepared for breeding, do a large water change around 40 to 50% with slightly cooler water, around 3 degrees cooler than the original tank water right before you turn off the tank lights for the night. If you are lucky you might find eggs on the glass, plants, filter, thermometer, etc.
for reference the eggs should look like this:
My corys have a nasty habit of eating the eggs after they lay them so I have had to take the eggs out of the aquarium by hand after they are laid to protect them for the parents. I have a better way of doing this if you are really serious about getting large numbers of fry. I have two aquariums going one 20 gallon home aquarium for the cories while they are not need for spawning purposes and a 10 gallon breeding aquarium. I place the cories that i would like to breed in the 10 gallon aquarium after conditioning them well on the food mentioned above, the 10 gallon I keep bare-bottomed and place several fake broadleaved plastic plants, I do the water change witht he cooler water and I keep the lights off, only turning them on to check for eggs periodically. Once I spot eggs I remove the adults and place an airstone under the eggs to prevent fungus. The breeding aquarium I keep cycled when i am not breeding cories by housing several Endler's live bearers in (of course take those out when breeding the cories, and when the eggs/fry are in the tank). I actually keep a canister filter attatched to the breeding aquarium, but I affix a sponge filter attachment to the filter intake to prevent the little ones from being sucked up into the filter. I keep the canister connected because I had large die-offs when I did not have vigorous filtration in the tank, and it helps to reduce the endless water changes, that should be done if you do not have filtration like I have listed. This may just be due to the fry I raise being pandas and prone to water quality issues.
Once your fry have hatched they will still have a yolk sac located in their belly but it will run out within a day or two so you should already have some live brine shrimp ready to feed. If you use the canister filter, turn it off when you feed the brine shrimp to the fry because the brine shrimp will be sucked into the filter before the fry can eat their fill. You can tell if the fry are eating the brine shrimp because their bellies will turn orange turn the filter back on one the fry all ahve orange bellies to suck up all of the other brine shrimp so they don't foul the water.
Yolk Sac visible in this pic:
Orange Brine Shrimp filled belly in this pic:
Continue this process with small regular water changes until the cories look like miniatures of the parents, this is when i place the fry in with the parents and start the process over or reintroduce the Endler's to the breeding tank.
Time to introduce the young to the rest of the school:
Once you get your cories breeding they will breed every few days or so and as the cories get bigger and older they will produce more eggs to raise. This is just my method i know that there are plenty of variations out there but I have found that this one works the best for me.
Later,
Rez B)
jollysue
Fish Connoisseur
Well I am going to assume that you have either C. aeneus or C. palaetus (albino bronze or albino peppers--although albino C. sterbai are also available.)
If you have C. aeneus or C. palaetus the only real requirement to breed them is to have a male and a female. If you have a male and a female of one of those species, they will spawn. If they are aeneus in a species only tank you will probably eventually get a fry that will survive to maturity.
There is a thread above that gives one method of successfully hatching and raising Cory fry.
If you have C. aeneus or C. palaetus the only real requirement to breed them is to have a male and a female. If you have a male and a female of one of those species, they will spawn. If they are aeneus in a species only tank you will probably eventually get a fry that will survive to maturity.
There is a thread above that gives one method of successfully hatching and raising Cory fry.
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