I think the tall plants in the back of Tarev's beautiful pond are the large arrowhead. They look just like the ones I have if they had more room to grow. It is a gorgeous pond Tarev, so nice that you got to visit it.
I wish I could help you with the ipad and pictures Bert, I will try it later tonight with my ipad as I have not tried before. Maybe we can figure it out.
Cameron, if you let the lotus pot slowly dry out, the tubers will go into hibernation and you can keep them warm and dark over the winter. I'm not positive about the over winter part but I have let mine dry out and then kept them for a month or so before replanting them so I think it would work. Don't let them freeze or even get really cold but dry will keep them dormant. They are native to an area with a wet and dry season and they wait for the rains to grow again.
