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Symptoms Finder

You'll get a picture of the koi/goldfish, you click on the koi fish where it's sick, or choose from several other behavioral options that your koi may be exhibiting.

What KoiCrisis Is For?

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We offer FREE personal help with your sick fish and/or pond water quality problem. Fill out our easy “Help Form” by Aqua Meds

Feeding Koi

What to feed?
What not to feed?
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Aqua Meds®

Have questions about care of sick fish and/or pond water quality problems and how to treat them? We have the answers.

Fish Medicines

Learn about fish medicines, what they do, and where to get them.

PondCrisis.com

If you have a koi, pond or fish problem, this site takes you through twenty easy questions and at the end you know what you need to fix in your pond to create restored Koi health.

 

 

Koi Pond Care

Koi Pond Carbon Dioxide

CO2 can exist in koi pond water independently of dissolved oxygen. If the level gets too high, even with normal dissolved oxygen levels, koi illness will result.

Many atmospheric gases dissolve in koi pond water to some extent and carbon dioxide is one of the most important. It dissolves readily to form carbonic acid, giving a weakly acidic solution. This chemical reaction has important consequences, not only for the eventual chemical content of pond water, but also for other chemical and biological reactions that occur in the aquatic environment. The naturally acidic nature of rain allows it to bring other, less reactive, substances into solution. (The pH of naturally formed rainwater is about 5.6 but, as we shall see, local atmospheric and landscape variations can alter it significantly before it gets anywhere near our koi ponds.) The affinity between carbon dioxide and water has many far-reaching effects on koi pond water quality, playing a major role in plant and koi respiration and pH buffering.