Why is my koi rubbing on rocks? - Treatments for diseased fishes

Costia

Why is my koi rubbing on rocks?

Fishes having Costia usually show this symptom of 'Rubbing against hard objects'

Carefully read though the article to find out whether your Koi is having Costia.

About disease, Costia

Affected fishes often swim awkwardly, with their fins folded.
They may try to scrape them selves against solid objects. On closer examination it is possible to see an off-white film over the body with reddening of the most of the areas.

Physical Symptoms

  • Inflamed patches

Behavioural Symptoms

  • Rubbing against hard objects
  • Swimming awkwardly
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Skin fluke diseased fish

Koi sufferring from Costia

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Treatments

Raise the temperature

The simplest form of treatment is raising the temperature up to 30℃ without harming the fishes.

3% Salt Dip

Put fishes in a 3% Salt dip until fishes roll over. Then quickly move them back into their own tank.

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