Symptoms associated with Costia
- Bluish or white film on the body because of increased mucus production.
- Penetrates the epithelium causing tissue irritation.
- Open wounds or ulcers.
- Reddening of the skin and fins.
- Koi may become lifeless and hang in the water with clamped fins.
- Frequent flashing/flicking.
Prevention of Costia
- Costia mostly become a problem when fish are stressed. It may be environmental factors or frequent netting or presence of predators.
- Maintain good water quality.
- Avoid frequent changes in temperature by heating the pond during Spring and Autumn
- Do frequent system maintenance such as water changes and filter discharges.
- Avoid introducing new koi without quarantine.
Treatment for Costia
- Costia has a relative short life span and a once off treatment is usually enough.
- Malachite Green and Formalin.
- Potassium Permanganate.
- Salt. (Some salt resistant strains do occur!)
- My personal choice would be Malachite Green and Formalin
Updated 23 January 2009
Last Updated on Friday, 23 January 2009 19:37