Fiberglass pool frozen.

Our power has been out for more than 24 hours. It is 0 degrees in Fort Worth Tx. I drained the pump and filter, and feel like that is pretty safe. I have fiberglass pool and have been breaking the ice around the edges aver two hours because I am worried about it breaking the pool.

Is that an issue? Do I need to continue breaking the ice around the edges?

Thanks.
Harry