I'm not the person you're replying to, but I have a pond too. Mosquito dunks are one way to deal with mosquito larvae without resorting to a conventional pesti

I'm not the person you're replying to, but I have a pond too. Mosquito dunks are one way to deal with mosquito larvae without resorting to a conventional pesticide. Another is to have some kind of fish. Mosquito fish are probably best. I think koi/goldfish tend to eat them too. https://summitchemical.com/products/mosquito-dunks/ https://summitchemical.com/products/mosquito-dunks/ Taro needs to be moved indoors for the winter if you're in a cold climate. Water hyacinth and water lettuce also don't survive winter. I don't think frogbit does, but regardless apparently it's considered invasive where I am (Oregon) so the pond/garden supply places don't sell it anymore. Azolla (aka fairy moss or mosquito fern) can survive the winter. It turns red when it freezes, but it starts multiplying again when it warms up. Cattail and hardy water lily can regrow from the roots. Same with water clover. Duckweed is similar to azolla, but does not survive in winter. If you buy water plants, you may end up with duckweed that went along for the ride. We had a lotus, it came back after one winter, but didn't survive the next. (Our last spring was very wet and cold, and lotus apparently like hot weather and sun.) Incidentally, if anyone reading this is in the general vicinity of the Willamette valley, I highly recommend visiting Hughes Water Gardens in Wilsonville if you get the chance. It's a plant nursery, but they sell mostly aquatic plants, and also pond supplies and koi.