I've tried that and I still get more fish. In fact, I have NEVER tried to protect the little guys and I have a ton of fish.I control breeding by keeping the males and females separate or simply not bothering to try to protect any fry born in my large tank.
Ask the fish shop if they'll take them as feeders. My LFS won't take fish for credit unless they're over one inch. They will take any size fish as a feeder though.I have no one to give them too and the fish shop won't take any.