Koi & Pond Water Care

Site Links

Pond Water Quality

Pond Ammonia
Pond Nitrite
Pond Nitrate
Pond pH
Pond pH Crash
Pond Dissolved Oxygen
Pond Hydrogen Sulfide
Pond Water Changes
Pond CO2

Parasites Main

Koi Flukes
Koi Trichodina
Koi Costia
Koi Chilodonella
Koi Ich
(White Spot)

Medications Main

Salt
Formalin
Praziquantel
Diflubenzuron
Potassium Permanganate
Acrilavine
Chloramine T

Shotgun Remedy

Feeding Koi

Go Green 100% Natural Aquameds

The New Generation of
Beneficial Pond Bacteria
100% Natural
No Harsh Chemicals
Pond Care Treatments

Deadly Bacteria Control
Remove Bottom Sludge
Remove Ammonia Spikes
Control Organic Growth
Maintain a Healthy Pond
Winter Pond Care

Koi Costia (Ichthyobodo necatrix)

Costia or Ichthyobodo necatrix, is a ciliated protozoan parasite of freshwater fish that also has the capability to kill pond fish in great numbers, and in no short time-span. The only good fortune in this is that most Costia perishes readily when salted. Costia may be attached, or free swimming. Attached Costia look like little commas stuck into the skin (or gill) by the thin end. Free swimming Costia are graceless wobbly swimmers that look like commas or almost like half open Conch shells.

In most cases, Costia clears easily with salt, and this infection should be suspected when a lot of fish are dying, fins may be reddened, and it appears that the koi fish cannot breathe very well. Spider web lesions in rapidly dying pond fish are also characteristic as well as excess mucus.

When salt is ineffective in treating Costia, Terminate is recommended.

Links You Might Also Like

Fish Medicine
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.

KoiCrisis.com
Koi Crisis has a symptoms chart by system you can choose the symptom by fish part, and resolve a lot of Koi pond fish problems or at least, learn about them understand how to remedy them.

Koi Food & Feeding
What should you feed your koi? How many times per day? Is Corn really that bad in a Koi diet? What are the most common feeding mistakes people make? What's the best food? Help With Koi Problems