How about a system that pumps the de-oxygenated water from the lake to a onshore oxygenation device and then pumps the O2 water back into the lake. These two lines (intake and output) could be installed from the shoreline which would leave the ice to develop normally. The O2 water would be released over the length of a pipe laying on the bottom or suspended to a decided depth. The water being oxygenated probably wouldn't compromise the ice like larger air bubbles.
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This country was started by voyagers whose young lives were swept away by the currents of the rivers for ten cents a day... just for the vanity of the European's beaver hats. ~ Red Bullets
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It is when you walk alone in nature that you discover your strengths and weaknesses. ~ Red Bullets
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