OK, now I totally understand! Gives me ideas of how to protect my lotus for this winter, all in the same large tank, rather than individual pots, which would be impossible to keep from freezing. And, not certain the pots I bought would hold up to freezing temps anyhow, at least not with water in them, pushing on the sides. I guess a person would likely leave dirt in them in the winter, and moisture would be present, but usually a hole in the bottom to drain the water. We shall see!!!
So far 3 of them are still doing fine, had leaves when tubers arrived, and I asked about that, and the seller said "they are getting too big to ship" ... DUH!!! They are all still green, some yellow edges, but one of the tubers' leaves have all turned more brown. I'm hoping it will continue to grow roots, and send up new leaves this coming week, when the temps warm up that water! We'll see ...