Pregnant Fish: What to do

I have a reasonable survival rate by leaving the fry in the tank....at
least to the level my bio-load can cope with and when I have tanks with
fish liable to reproduce I add that into the equation....and enough to
get satisfaction from the fact that my fish are happy enough to breed
and the environment that I have created is good enough for the best to
survive...

If I wanted to seriously breed and sell on the fish then I would take
additional measures...but I don't - those that survive and live are the
fittest of the fry and the strongest of the stock....question is are you
a pet keeper or a serious breeder of fish??? And it has to be said that
these surviving fry build up the stock of my tanks....fit, healthy and
used to the environmental conditions - sadly their parents do not always
conform to these criteria...but that is another story....

Gill