FREE: pond plants in Bowen Island, British Columbia

I have a couple handfuls of small pond plants---a mix of frogbit and baby water lettuces. They've been reproducing in my little outdoor pond and started getting crowded. Water lettuce won't overwinter but I believe frogbit will (apparently it drops tubers to the bottom of the pond then reappears in spring).
If you have fish I don't recommend you take them as my goldfish have white spots (ich) which is contagious for other fish.