How to Winterize a Koi Pond
For those that live in southern climates where ice is not an issue in winter, you need not do anything different to your koi pond in the winter than you do in the summer. However, if you live in northern climates, you need to prepare your pond for the winter season to ensure a healthy springtime for your koi. Does this Spark an idea?
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Instructions
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Clean the surface and bottom of the pond. Leaves and debris left in the pond through the winter will likely pollute the pond as they break down. This is a health hazard to your koi.
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Decide the best way to maintain aeration in the pond for the winter season. You can either manually make sure that ice does not solidify on the surface every day, or for a more practical solution, purchase a floating heater. A heater will prevent the pond from icing over entirely, helping to aerate the water, and may even keep the water slightly warmer for the koi.
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Decide what you want to do with your pump. Many choose to bring it in for the winter to keep it in good running order, but you can keep the pump in the pond provided it maintains a strong flow and does not risk freezing. If you do this, make sure your koi have adequate hiding places as an overly strong current causes stress and could kill them. If you take the pump out, you still need to allow for movement in the water for aeration, so you will need to buy a fountain kit to keep the water moving to prevent freezing.
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Monitor the pond daily during the winter months to ensure the heater/pump/fountain are functioning properly. Replace any components that break down and be sure to keep the water moving.
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Keep up with cleaning and remove any debris that settles into the pond during the winter. To this end, do not overfeed your koi in the winter. As the water cools, their metabolic rates slow down, so they do not require the same amounts of nutrition as they do in warmer months.
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