Koi will survive in water temperatures from 35-95ºF / 2-35ºC, although they prefer cool water temperatures of 65-77º / 18-25ºC. Gradual changes in water temperature within a fish's optimun range seldom cause healt problems. Ideally, water temperature differences should be no more than 5ºF / 3ºC change per day.
Temperature shock can occur with rapid changes, especially from warmer water to cooler water.
Increasing the water temperature will lower the saturation point of dissolved oxigen ( warmer water holds less oxigen than cooler water). It will also increase the toxicity of disolved substances such as amonia, chlorine, and heavy metals. Most pathogens' activity will increase as the water warms as well.
Do you have a question in regard moving koi to a new envioroment you can call Chuck at 770-359-9927
or visit our Pond Store in Marietta. click on logo below to visit our web-site.
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