It does not survive the winter unless your water does not freeze.....some suggest Koi that eat them up..............Koi need deep water so they don't freeze this might work for you. you did not mention what kind of fish you have, but I am sure you could see them to a place that sells fish for fish tanks. I know in Philadelphia Pa, I had to buy it every year. The water lettuce has real long roots on it...pull out so much every day I wonder if water lillies might crowd them out...............