Eichhornia in water

This flower is new to our garden. I bought Eichhornia this summer. Now the flower is dying. But I hope this plant will survive the winter in a frozen pond. And in the spring we will be able to see Eichhornia again.

And this is a video of our flowers in the summer
Video: "Purple petunia"
https://rumble.com/v58u75x-purple-petunia.html