How Long Can A Cory Eggs Take To Hatch?

[ICEEGRL]

What is the longest they have taken and still hatch?
I have some that are 8 days old now. They don't appear to have fungus, and they looked viable. They just aren't doing anything.
I also have some that are 5 days old. (very clean... just not hatching.)
I will post a pic when my batteries get charged. They died on me.
Maybe someone can tell me if they look like they may still hatch.
Thanks!

 

[Coryman]

On average Cory eggs take between 3 and 5 days, There are reports of eggs taking over a week, but that is exceptionally rare and I think that some change in the conditions caused a temporary halt, a little like some Killie fish eggs that will only hatch when all parameters are suitable.

What species are they.

Ian