Home - Koi Medication - Koi Parasites - Sick Koi Symptoms - Pond Water Quality
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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.



Topical Remedy for Koi Ulcers and body sores

Topical treatments for koi ulcers and body sores have ranged from Iodine in the olden days, to potassium permanganate rubs and even more recently, hydrogen peroxide. These have one thing in common: They excoriate or burn the adjacent tissues.

  • Panolog – Antibacterial and anti-inflammatory, helps healing. Can work alone.
  • Tincture of Iodine – cauterizes, applied directly, stains badly. Very effective. 7% best
  • Hydrogen Peroxide – Elegant! Very effective, no staining, cauterizes, antibacterial, safe.
  • Potassium permanganate – caustic, stains, antibacterial cauterizer.
  • Mercurachrome – Stains for a very long time, safe for humans, effective, good choice. Do not scrub.

Healing Koi Ulcers and How You Can Screw It Up

  • Folks, only treat meat-red, bloody koi ulcers
  • Don't treat pink wounds directly.
  • Do not scrub if koi ulcer is tidy and neat.
  • When the koi ulcer is pink with white rim – LEAVE IT ALONE
  • Do not scrub healing koi ulcers


There is little doubt that the average hobbyist would be best served to combine MediKoi medicated food and antibacterial bath together to recover their koi. Not only are the treatments effective, they are also cost effective.