How many generations of fry in one growing up tank?

[danbb]

How many generations of fry can be kept in one 25 L (aprox 7 G) tank? Some say just one, others say more...
If the number of fry is ... let say about 100 from 2 generations (one next the other, with difference between them from about 3 weeks), can I keep them together?

 

[Mike Wise]

100 fry in a 25 L tank? You are a better aquarist than I! If your fry are about the same size, there should be no problem keeping 2 generations only 3 week different in age. The problem is how many fry you expect to grow in such a small tank without killing the from poor water quality, or stunting them.

 

[danbb]

I said 100 as a maximum number. The difference in size between generations is quite big, that's why few hours ago I started second growing up tank for the second generation.
Thanks.