I would say it should be ok, but thats really the minimum size.
They like clean, well oxygenated water, and not too hot. Max 25C.
There is a good article on them here.
[URL="http/www.practicalfishkeeping.co.uk/pfk/...?article_id=446"]http/www.practicalfishkeeping.co.uk/pfk/...?article_id=446[/URL]
Hope this helps you.
Cheers
BTT