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Cory Eggs

rarefish

rarefish

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I have 2 males with 5 females in a 20 gallon currently. Well, yesterday I woke up before doing some final Christmas shopping and found 100+ eggs :)! Today I found about 200+ eggs :D! All of the females are full size, around 3" each. I removed the eggs and put them in containers where I do daily water changes, and keep them warm. How warm do I keep them, how long until they hatch, and how do I know if they are fertil or not? Thanks ahead!

rarefish
 
Hi rarefish :)

Congratulations on your "Christmas Corys!"

If they are C. aeneus, they will hatch in about three to four days if you keep them at about 75 degrees F.

The most important thing right now is to be sure that they have strong water flow directly over them. It would have been better if you had more males, but nevertheless, you should still expect to have a large percentage of fertile eggs. They will darken somewhat and remain solid in appearance while the infertile ones will develop fungus.

Good luck with them! :thumbs: Don't hesitate to ask questions and I hope you will post more and let us follow their development with you. :D
 
Both batches hatched on the same day :D! They are already eating and getting on their little fins! I've been feeding them Hikari First Bites and freeze-dried baby brine shrimp mixed in water to sink to them. Is there anything else I really need to do? I'll also be doing daily water changes(is that ok?). Thanks Inchworm!

rarefish

P.S. So far(still hatching) there are around 50 :D!
 
I had around 50 but now I only see 1 that is moving :/. Water stats are ok, temp is around 72F, so I'm not sure what to do. Help!

rarefish
 
Hi rarefish :)

Please back up a little bit here and give me some more information. According to your first post, they were spawned on Dec. 23 and 24. This is only the 26th. Even if they hatched today, it's still too soon to feed them. I would expect them to be huddled together in one spot while absorbing their egg sacs.

Are you sure they were cory eggs? :unsure:
 
Yep, the only fish in the tank. I was surprised that they hatched so soon :/. Thanks.

rarefish
 
I just checked and the fry do have fairly large egg sacs. They are Corydoras aeneus. Some of the fry are full albino(one male was albino, all females albino) and some are half "bronze" and half albino. I just hope that they will be ok in the end. Last time the eggs were infertile and never hatched. Should I just keep them in clean water until their egg sacs are absorbed? Thanks again!

rarefish
 
Hi rarefish, you don't have to feed the fry until their egg sacks have disappeared. They will not eat until then. Unfortunately, the uneated food that you fed your cory fry have probably increased the ammonia levels in your fry tank. Keep up with the water changes and make sure you use a water conditioner for your tap water.
 
rarefish said:
I just checked and the fry do have fairly large egg sacs. They are Corydoras aeneus. Some of the fry are full albino(one male was albino, all females albino) and some are half "bronze" and half albino. I just hope that they will be ok in the end. Last time the eggs were infertile and never hatched. Should I just keep them in clean water until their egg sacs are absorbed? Thanks again!

rarefish
Click to expand...

They will absorb their egg sack for 24 hours. Then you need to feed them liquid fry for a day or 2. Then you need to think about feeding them something like microworms. You do not need a filter until about 3 weeks, which is why daily partial water changes are a must to keep the water conditions under check. The fry are extremely small and delicate and the filter is too strong for them. The water changes will also help the fry to grow bigger and faster. All you need right now is a air stone to keep oxygen in the water and the proper food to feed them. Im sure Inchworm will post and add anything I left out. Good Luck.
 
Hi rarefish :)

You have received good information so far. :nod:

Since your spawning group are all of the same species they will be fine. Some of your fry will probably be one color and some the other.

The challenge with raising cory fry is that they need to eat as much as possible to have rapid growth, but at the same time, the tank should be kept as clean as possible since they are resting on the bottom where the uneaten and decaying food and wastes end up.

This is why microworms are good. They are live food with a high protein content to promote tissue growth, are small enough for very young fry to eat, and live in the water for a period of time. It takes a couple of weeks for a culture to get going good, but if you think you might want to raise another batch, or raise other kind of fry, it's well worth starting one.

Here's a link to the place I bought mine, but there are also sellers on AquaBid:

http://www.livefoodcultures.com/microworms.html

In the meanwhile, I'm not sure if it's a good idea to feed the freeze dried brine shrimp. I've never heard anyone's experience with it, and it might be too concentrated or have shell in it. I would suggest holding off on that until they get a little bigger.

Your fry will grow quickly. Please continue to let us know how they are doing. :D
 
Just to let you know, They do not sell the cultures from the website anymore. You have to buy from them off Aquabid. I think their ID is Bugfarm or something. I won an a kit on Aquabid and recieved it 3 days later.
Click to expand...

I do remember you saying something about not finding a link to order, Barracuda518, but I must have thought you'd find it. It was only a few months ago I bought from them. It was a good company to do business and I hope the are still selling somewhere. :D
 
I'll definitely be looking into buying a culture off of Aquabid :D! So far they are doing good. I am about to clean out their tank, and will check their egg sacs. Thanks for all the info! If I get a chance, I'll take some pictures :)!

rarefish

P.S. _cRaCkEr_, I'm not sure. I'll have to look (what does FHUSA mean again :lol:???) Thanks!
 
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