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Joined: May 2004
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Moderator Lunker
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Moderator Lunker
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Oxygen levels in iced-over water should remain sufficient for fish IF the ice is clear to allow sunlight through for aquatic plants/algae. There's minimal plant O2 production in cold water, but also minimal O2 consumption by fish. It balances.
If the ice is cloudy or snow covered, opening a hole through the ice (or removing at least 10% of the snow cover, which has never appealed to me personally) is warranted.
"Live like you'll die tomorrow, but manage your grass like you'll live forever." -S. M. Stirling
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