Question about bristlenose eggs

[p1ngu]

My bristlenose eggs have all hatched, around 3-4 didnt hatch, and two or so fry are dead.

The rest look fine with egg sacs still.

I was just wondering is it common to have a few not hatch/or die?

Thanks.

 

[smithrc]

yep - quite normal - make sure you keep the water clean - 10% changes every 1-2 days.

if you dont there will be more casualties