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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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Need Help Now?

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?
How much to feed?
What to look for in labels?

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.


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 pH

Pond PH is only a measurement of the free Hydrogen ions in the water and is very, very dynamic. Your pond pH can change overnight...In particular, your pond pH is prone to fall, and "crashes" are quick, and fatal. Interestingly, many people say they checked their pH last week, and are surprised to find that their pond pH changed overnight.

In simple terms, the pH in your koi pond is supported in range by the carbonate activity of the water (measured in Total Alkalinity) and when the carbonates are exhausted, or overloaded, your pond pH plummets to 5.5 and kills your pond filter bacteria and koi. In other situations, your pond pH can glide downward very slowly over months and thus your resident koi can survive a low pH but your new koi you keep buying perish quickly as they enter your koi pond water with a very acid pH.

Check the pH in your koi pond regularly, and also, to get a grip on your 'safety net', measure your pond water's carbonate activity as Carbon Hardness (KH) as well.

Buy carbonates for the pond in a sensibly priced pH Buffer.