Congratulations, Rafael, – thats great to hear that they have spawned.
My answer to your question is another question: Why do you not think about moving the parents ??
I never move the fry, – I know you can do it, but I think it takes some practice and skill. At whatever stage the egggs or fry are very vulnerable to change in water, or to movements. I imagine it is really difficult to move the tubes or caves without eggs or fry slipping out.
I would always move the parents. To catch the female – with a little practice and a little patience should not be too difficult. I would catch her out first. Leave the male to guard the nest and when all fry has left move the male.
If you worry about moving and catching, leave both parents and keep an eye on when the fry is beginning to leave the cave. And then just catch the parents. Even if you create a turmoil catching, the fry will just seek cover somewhere, – they will survive.
That is my advice anyway, dont move the fry, move the parents.