Help with hatching fry

[Willi1226]

Hello

To start I’m far from a beginner I’ve kept angelfish, corys, and fancy guppies for 20yrs now. I successfully hatch angelfish eggs, raise guppie fry and oh yeah mystery snails from eggs also.have 7 different aquariums. 2 10 gallons w/bettas. Other 5 range from 30gal to 70gal w/ angels corys guppies. All have mystery snails.
Ok so I noticed my corys layed eggs in my 70 gal, in there I only have 5 corys 2 albino 3 regular corys. Idk who parents are. I saved the eggs with a credit card. Filled a 1 gallon 3/4 of the way w/ water from parents tank. Added a heater, set to 75f, used a 1 gal sponge filter and prolly around exactly 3 days I noticed a fry cruising around. So I thought” there hatching. Now 12 hours after first fry I got like 3-4 fry. And the other 60 or so eggs haven’t hatched. For the most part most seem good still. I treated water with methylene blue when the eggs went in.
Should all the eggs hatch at once!!!! My angels and mystery snail eggs always seem to at once???

 

[FinalFins]

Are any of the eggs Milky white? I don't think they hatch at the same time.

edit- and what species of cory you have? besides the albino ones?

 

[Willi1226]

Not milky white, they are whiteish beige. The methylene blue kinda turns the water a blue color so hard to tell. I honestly thought they were infertile they were layed in the current of my filter in my big tank. And the chances I got a breeding pair of the same kinda Cory is not good. Idk if albinos and reg corys can mate. But I do have some fry swimming around

 

[FinalFins]

Well if you could get a pic of the reg cories it would help on the parents. If you got albino and bronze cories, they are both the same species.

 

[Willi1226]

Yes by reg I mean bronze. I agree why not, they should be able to breed. I read a post that says they can’t but sounds dumb. I also read that to much water can drowned them, sounds false also there fish as long as water has airation there fine. We’re I’m from we had a hurricane years ago pretty bad but lost power for 2 weeks and I lost all my fish but the corys. So my 1 gallon jar filled 3/4 should be no problem.

 

[FinalFins]

Ok, then they are probably the same species, c. aneus.(is that how you spell it?)

Yes. Then you can transfer them to a larger tank .

 

[NanaT]

Hi!
Congrats on the cory fry!! They don't hatch all at the same time. Some will take a few days. I have only been able to keep the fry alive for 2-3 weeks (2 months ago) I kept them in a net breeder in the parent tank with an air stone, moss ball & a small floating amazon plant. I think the nitrates caused their demise since they got up to 40 with ph 7.0, ammonia 0, nitrites 0 & temp 78°. I also have bronze & albino cories. The albino fry were more cream colored and the bronze fry had dark heads (eyes). I have used methylene blue and shrimp to keep fungus away. Good luck!! I'm waiting for mine to lay eggs again.