I keep fries in same tank with breeder box. Overfeed foods in breeder box will foul up water and stress the fries ( small fish easy die ) if regular WC not provided. Even if I don't overfeed I try to do regular WC 30% every 2 days and remove uneaten foods.
Unless you trsf the fries and keep in separate tank with sufficient filtration then MAYBE overfeeding can be done ( try on your own risk, I've never try before due to limited space at home ).
p/s from my own experience in fry raising, other ppl might have even better methods which i might not know.
