not for me Grimster
the smaller the tank, the harder to maintain water quality - especially with the feeding of fry (see below)
if you looking for somewhere to put fry temporary then maybe, if you looking to grow the fry on proper, i would try and go for something like a 18x10x10 inch as a starting point thats about 30 litre and 8 US Gallon
Its the size i used to start my fry off in, they dont "need" all that space to start with, but it makes it so much easier to keep a stable environment
You have to feed multiple times a day to give the fry the best start, and get the balance right between heavy feeds and regular partial water changes to maintain 0.0 Ammonia and Nitrite, although you'll have to use more water, its easier to achieve this with 8 Gallons than it would be with 2.5 (in my experience)
I am assuming upwards of 50+ fry, obviously if you end up with just a few, maybe dont need 8 US Gallons