If you do nothing but get bigger tank, you guppies will only multiply at a higher rate. Here are your options as I see them, rated by my preference:
1) Keep the fry with their parents and reduce the number of places to hide.
2) Set up a chichlid tank and use the guppies as feeders.
3) Take the extra guppies to your LFS.
4) Euthanize the extra guppies.
1) Keep the fry with their parents and reduce the number of places to hide.
2) Set up a chichlid tank and use the guppies as feeders.
3) Take the extra guppies to your LFS.
4) Euthanize the extra guppies.