None of my bronze corycatfish eggs are fertilized!!!! Help:(

[Mengo]

I've got bronze corydoras and I've got them to breed 3 times now(at 2 to 3 week intervals). I was pretty excited when I saw the eggs as it was my first time EVER seeing fish eggs in my tank(i'm pretty new to the hobby, 1 year experience only). I spent the whole afternoon making diy breeder containers from tupperware since i read that the baby fry and eggs may be eaten and I only have one 10 gal.  I also read that eggs will turn brownish if it was fertilized. You can imagine my disappointment when i checked on them the next day and they were all white. And this has been happening all 3 times. I see the catfish doing the "T" position but not quite the "T" position. I've seen many videos of corydoras breeding and I always see the male lying on the side while doing this, but mine are just on their belly. The female also isn't actively trying to get the sperm, she just normally breathes(sorry for bad description,I don't have any video footage). So I am wondering if thats the issue none of the eggs are fertilized. Is it because my catfish don't know how to properly breed yet? Idk. Much help appreciated:)

[gardenman]

It's possible you don't have a male. Female fish will sometimes pair off and lay eggs but without a male. Female corys are typically bigger and stockier than the males. For no eggs to be fertile in three spawns, either you've got all females, or an infertile male. In the fish world, at least some sperm should find at least some eggs. It would be nearly impossible to have a fertile male doing his thing and missing every single egg. There's only so much water in the tank, so sperm should find at least some of the eggs.

[Fish Folk]

What gardenman describes may well be your situation. However, give it some time. Ours also had low fertility at first. Feed well... heavily... change water frequently... make sure there is enough flow in the tank... and if you haven’t already, check out this breeding report:

 

[Mengo]

@gardenman If I've got an infertile male, will it eventually be fertile? And will different corys breed? I got my first corys from petsmart ad they were labeled as green emerald corys. After some research I realized that they needed t be in a group of at least 6 to be happy, so I went to a lfs and bought more. The cory they sold was labeled as bronze cory catfish. The ones that breed are 2 corys, one green emerald and one bronze, is that why the eggs aren't fertile?

[Colu]

I have had an all female group of pandasl Cory's lay egg before

[Mengo]

Oh, so what I need is a male cory?

[Colu]

If you have room in your tank a get a couple more and you should get a male

[CorydorasEthan]

I have a similar situation. I have two female albino Corydoras aeneus, and one male C. aeneus (but he is the bronze strain). He will mate with them frequently and they will lay their eggs (always on the same spot on the glass I don't know why). Whenever I collect the eggs, none of them hatch, and they all turn pure white. I don't know, but based on this experience, some males not be fertile, or the crossing of the two strains might not work.

Also, my Corydoras paleatus (peppered cory) breed sometimes at the same time as the aeneus. I would put both batches of eggs in the same tank and only the peppered cory eggs hatched, so I know for certain it has something to do with the fertility of the eggs, and not the care.

Hope this helps.