Why Fish Die in Man Made Ponds


Fish ponds are ornamental additions to property. Fish die in ponds when the fish lack adequate oxygen or nutrition, or when harmful chemical changes occur in the water.

Pond Ecosystems

Ecosystem Changes


  • Toxic chemicals from herbicides, weed killers, insecticides, fertilizers, or unmonitored pH changes, may change the character of the water and kill fish. Keeping harmful chemicals away from fish ponds is critical.

Monitoring Ponds

  • The artificial pond should be checked regularly for temperature, pH, plant health, accumulation of algae and overall appearance. Maintain a "pond notebook" that lists times, dates and pond conditions.


  • Whenever fish regularly die in a pond it is important to evaluate pond location and conditions. Sometimes, a new pond and location is the best choice for healthy fish, in other cases regular pond care works well.

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  • Photo Credit Image by Flickr.com, courtesy of Madalena Pestana Image by Flickr.com, courtesy of Fanch Image by Flickr.com, courtesy of Randy Image by Flickr.com, courtesy of Beatrice Murch
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