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Tuesday, February 27, 2007

My pump went out for a few hours, are my Koi OK? -Dave

Your Koi should be fine, unless you are very heavily stocked and its a hot day, then you should panic.

A couple of things happen when a pump stops pumping:
  1. The filter stops working and some ammonia will build up in the water. A few hours is not long enough for toxic levels of ammonia to build up. Your filter should remove any buildup shortly after you turn your pump back on.
  2. Another filter related thing, if your not pumping water and you rely on a biological filter to clean your water, your nitrifying bacteria that live in the filter are not getting any fresh food (i.e. ammonia, nitrite) or fresh oxygen. Don't worry, you won't lose any noticeable amount of bacteria in a few hours. The on;y reason you should be concerned over this is if your pump was off for half a week.
  3. The oxygen levels in your pond will drop, but only if you are relying on a waterfall to aerate your pond and you don't have an air pump/air stone to supplement it. During mild temperatures, a few hours won't hurt, but be cautious if its 90 degrees Fahrenheit during the day and your water temperature is 84 degrees Fahrenheit, you could run out of oxygen fast.

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