nightcrawlers in hard water?

[callie]

Does anyone out there use nightcrawlers in the winter ice fishing season? My son asked the question, "if we can catch them in the summer using crawlers why not in the winter?" My response: after the frost set in they're history. But I'm sure someone has figured a way to keep them year round and use them during ice fishing outings.

Now if I was to try to keep them at home in my refrigerator I would not be having many adventures out on the ice if you catch my drift.
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