1. Check in advance with a local pet store and see if they will take they fry as a donation or for a trade. (Most will).
2.
Put them in a small pond that you may have near, or on your property and allow them to continue to thrive there.
3.
Put them in a freshwater, warm lake. (They may get eaten but they will more than likely thrive in a lake).
4.
Keep them and continue to breed them.
I'm sure there are more things
to do with your fry but here is what I suggest. You don't
have to get rid of ALL of them just enough so your tank isn't overcrowded...