Hi,
But, as I say, the real trick is to get the male to stay on the eggs.
Often that is depending on the male!
Some males clips the clutch very strongly with their lower lips. So even if you try to take the clutch away from them, catching the male with the hand they never would leave the clutch by choice.
On the opposite there are some males which respond to least incident and leave the clutch. If that happens at the first 5 days, a successful incubation of the clutch is nearly unpossible.
Because I'd like to get all fry of a clutch, I always take the clutch away from the male between the 12th and 13th day. At this time the hatching of the fry is near. Unfortunately you have to inherit the males job helping the fry hatching.
You can try biting the eggs, but I think thats not very tasty.
Instead of that you can take a needle or tweezers and tear the egg integuments open. Take a look for the fry, and if it is well developed and has a need for movement you can open all the other eggs of the clutch. Unfortunately this procedure is necessary, otherwise the fry will die inside the integuments.
The first times doing this you surly will demage one or two frys of a clutch. But with some routine you will manually hatch 100% of the developed eggs.
so long
Norman