Unfertile eggs

stannyblade

Member
Nov 5, 2009
99
0
6
Sheffield UK
I have a group of Corydora Napoensis that are spawning regular but there seems to be a very low fertility rate on them. Over the last 4 nights I must have had 250 + eggs. I had a spawn last week as well but only seem to have had half a dozen hatch so far and can see lots of white eggs.

I know I have more females to males but would adding more males help the fertility rate?

The tank is 24 x 12 x 12 and there are just the 8 napos in it.