Fry - Semi OT

I recently spotted a three 1 inch gold shubumkins and several other gold
fish fry, in my pond. I guess these are product of my comets and
shubumkins springtime activity.
Anyway I was wondering about the best way of giving the little guys a
good start in life and was considering buying an aquarium, where I have
more control over their conditions and they can't be eaten by the
parents etc.
Is this a sensible idea or am I being too sentimental?
Peter