It all depends on the type of fish. Most of the easy to breed species
will do best in very similar tanks to their parents. That is plenty of
things to pick on.

I have some Neolamprologus leleupi that bred three months ago in a
community tank. They are very difficult to catch so some of them were
left with their parents and a selection of other Tanganyika cichlids.
The ones I left in the tank are growing much faster that the ones
taken out and put in a fry tank. The basic difference is that the
community tank is full of bits for them to pick on all day while the
"clean" fry tank just gets four or five feeds a day.

When I was into breeding fish in a big way and had 50 tanks, I learned
that the most important things needed to grow fry is a continuous
supply of suitably food and frequent partial water changes.

Steve

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Steve Wolstenholme Neural Planner Software

EasyNN-plus. The easy way to build neural networks.
http://www.easynn.com