No the EGGS are not Fertilsed yet as they keep laying them then the next day they are gone, so they are not old/mature enough to fertilise them yet, they have had about 4-5 batches of EGGS but just keep eating or killing them!!
Cool!
So the fry from the original paire are what.....4 months old? And they are attempting to spawn already..??!! Or are they a bit older than that now?
Have the original pair spawned again?
And is it still only 2 of the fry that are showing colours?