What I think is the reason my Corydora eggs hatched

[Mississippi fish guy]

note: I’m not entirely sure if this is considered an experiment since I didn’t even plan on doing what I did.

While I had no intention of doing I think I may have found why my eggs always got fungus. This time a large part of the eggs were not sticky, do I had to let them free float in the breeder box. It’s a Fluval 0.5 gallon breeder box and I ran a Walmart brand aerator in it. My guess is that, while the aerator does produce enough bubbles to create good flow, it did not produce enough flow to help with he eggs on the side wall. Since it cannot be adjusted the flow can’t be increased. The eggs that free floated would eventually settle to a lower flow area until I disturbed them. Eventually they would collect at the bottom of the air stone and I noticed  that, except for infertile eggs, they had very little, if any, fungus. I think this is why some eggs hatched this time.

[Tlindsey]

1 hour ago, Mississippi fish guy said:

note: I’m not entirely sure if this is considered an experiment since I didn’t even plan on doing what I did.

While I had no intention of doing I think I may have found why my eggs always got fungus. This time a large part of the eggs were not sticky, do I had to let them free float in the breeder box. It’s a Fluval 0.5 gallon breeder box and I ran a Walmart brand aerator in it. My guess is that, while the aerator does produce enough bubbles to create good flow, it did not produce enough flow to help with he eggs on the side wall. Since it cannot be adjusted the flow can’t be increased. The eggs that free floated would eventually settle to a lower flow area until I disturbed them. Eventually they would collect at the bottom of the air stone and I noticed  that, except for infertile eggs, they had very little, if any, fungus. I think this is why some eggs hatched this time.

Yes your right. I know from breeding cichlids particularly the female will fan the eggs this prevents fungus  and helps oxygenate the eggs.

Edited November 6 by Tlindsey

[Maximus]

Good theory. Maybe pick up an egg tumbler if you can get one? 

 

Another reason the eggs should be reattached to the wall is that it makes it a bit easier for the fry to break out of the egg. Since it's adhered to a surface and not rolling around on the bottom, it gives them a bit of leverage.