Unfertile Eggs?

[Razatheblade]

Recently my Julii Cory's began breeding, I witnessed the breeding and the egg laying, too keep the eggs safe I removed them into a birthing tank inside the main tank, i ended up with about 15 eggs, non of which hatched any baby corys. this is the second time it's happened, I'm just wondering if there's anything I can do too make sure they hatch? Or is it a possible problem with the fish?

Thanks in advance!

 

[Harlequins]

There could be a number of reasons why eggs dont hatch - one is temperature of the water... whats your temp?
Its possible they could be in fertile...

Whats your 'birthing tank' - is it a plastic box? - do you put an airstone in there, this is recommended to aireate the water otherwise the eggs will go fungal.

Eggs normally take 3-5 days to hatch - this also varies on water temperature.

 

[Razatheblade]

The temp is around 77f the birthing tank is plastic, but does have numerous holes to circulate water, but there is no air stone? Thanks for the reply