I use a 10 gallon tank for raising my fry, but i prefer them birthing in the main tank, they seem more relaxed that way and all i hav to do is track the fry down and scoop them out, yeah i might lose a few because of other fish, but i have always had two fry at LEAST, which i am happy with, only recently i got a batch of ten, YAAY! double figures now, and thats from one of my preggy fish, i have another two that are still carring, i am going to have to give some of them away to me nextdoor neighbour when they drop...
O.O
But yeah it isnt a good idea to keep fish in a breeding tank for more than 24 hours, puts too much stress on the fish and she might abort giving birth...
48 hours? fishluver, do you mean a seperate glass tank, i think we are talking about those silly plastic things that are used inside the main tank, the small things that put stress on adult fish