How to Break Through a Frozen Koi Pond
Koi ponds should not be allowed to freeze over completely. Even in their slowed-down winter state, fish and decaying plants respire and produce carbon dioxide. If the pond freezes over, a hole must be created to allow these toxic gases to escape.
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Instructions
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Create a Hole
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Visually determine the thickness of the ice.
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For a thin layer of ice, less than 1 inch, you can try using a bucket or two of very hot tap water to create an opening.
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3
For thicker ice, use a heat gun. Use it only with an exterior grade extension cord and use extreme care. Water and electricity are a dangerous combination.
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Hold the heat gun approximately 6 inches above the ice, at least 6 inches from the edge of the pond. If you have a rubber liner, do not apply heat any closer than the recommended 6 inches.
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A battery-operated hand drill fitted with a large drill bit can be used to create a hole in the ice also. This hole can be enlarged with hot water or a heat gun.
Prevent Freezing
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Install a bubbler or de-icer to keep the hole open.
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Use only an exterior grade extension cord.
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If your pond has a rubber liner, use a bubbler. A heated de-icer can damage your liner.
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Tips & Warnings
Do not use a hammer to try to break the ice. The percussive sound waves can kill your fish.
