Milano,
I grew some lotus from seed last year. Each seed produced about 5-6 small tubers - 1/3 " diameter. I carefully removed them from the pots last Oct., cleaned them up and packed them in jars full of water and placed them in the refrigerator till about a week ago. I unpacked and separated them, warmed them up and began to see new growth. I have planted them in individual small tubs and they seem to be doing well.
Just an experiment but looks like a neat way to winter the tubers.
BB