its not set in stone ......they could be raised from day 8 or 9 onwards with baby brineshrimp (BBS) i think the longer they feed from mum /dad the stronger they will become and get a head start in life! ( makes sence to me)
The parents will at some point become sore from babys biteing chunks from them!......so i can only answer long enough but not to long ....im still learning
Ray?? how long do fry stay with mum & dad?