Winterizing tropical water plants

Moments before taking that leap of faith into the pond Mike C
at was heard opining:

I have had luck with some tropicals that normally wouldn't survive by
putting them in the deepest part of my pond before winter. I am in
Zone 5 (Chicago) and use a heater to keep the water from freezing.
You'd be surprised how many tropicals/sub-tropicals can survive in the
30s. Freezing is what will kill most. With my cover and heater and
the ground as an insulator, the bottom of the pond is probably always
at least 38 degrees.
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Which tropicals were you able to keep over this way? I don't buy
them anymore because I don't have room in my sunroom for any more
plants in the winter. Some tropicals get BIG. I'm in zone 6 central TN.
--
Koi-Lo....
Frugal ponding since 1995.
Aquariums since 1952.
My Pond & Aquarium Pages:
http://tinyurl.com/9do58
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