Five weeks old they are probably about 4mm in size? I might be wrong but you would have to wait until they are at least 1cm, maybe bigger, before adding them back to a community tank. Probably a bit bigger if you have mollies, they are do really like the occasional bit of 'meat', so if it is small enough to fit they will eat.
This would take about a month with good feeding and care they should be old enough sooner. Like I said could stand to correction.
Just my experiences, I have a VERY

, healthy pair of breeding convicts and I have just moved about 30 juvvies out in to a grow out tank as I have some 'fish' eating ciclids in the same tank and I found TWO
LFS's that are willing to take them off my hands, but from past experiences it took about two months for them to get to a size I could put them back into a tank with other fish.