Fish Disease Diagnosis
Fish Disease Treatments
Ponds, Aquaria & Filtration

Fish Disease & Diagnosis
Fish Disease Treatments
Koi Keeping Basics
Ponds & Filtration
Case Histories
Water Quality & Testing
Using Your Microscope
Fish Disease Movies
Even More Movies
Useful Aquatic Links
Site Map
Topic Search
Frequently Asked Questions
Koi Health Book
More Downloads
Site Sponsors - Fish medicines with usage guides - Hard goods and supplies as well as live fish to your door.

Suburban Water Gardens - Hard goods and supplies

Sho-Koi Food - Growth and immunity stimulating food

KoiZyme Anti-Ulcer - Added to your pond makes Aeromonas and Pseudomonas growth all bbut impossible

Aquadyne Bead Filtration - Among the first bead filters in the US constantly improved

We have had our large pond for about six years. We have a bio filter and a UV light. This week was the first time we ever lost a fish. We have no goldfish, only Koi. The koi spawn every year and we remove the babies. I missed three last year. This year, one of the babies showed up sick. He had a slime all over him. It looked like it was hanging off of him a little bit, there was so much. Some of the slimey coating had a beige color to it.

None of my fish has any other symptom. This is the only affected fish. I have been using Program on the fish over time.

Would Koizyme help my situation? Do I need to feed them a medicated food?

What you're describing is a fish with pretty severe immune suppression which allowed either Epistylis or Saprolegnia to infest it. Baby fish are more sensitive than other fish and I'd be highly encouraged that it was only one fish, and no other fish have symptoms.

So, what to do for the other fish.

Water testing. (Ammonia, nitrite, nitrate, pH and carbonate alkalinity.)

The most important tests among the above, are all of them. Ha! What you're trying to do is determine if there is a stressor in terms of water chemistry in their home.

We KNOW that this last winter's cold was a factor, a "given" if you will.

Koizyme is not a bad idea at all. Do it AFTER a major water change with dechlorinator.

Low level salting would also be a good, safe step.

Finally, breaking the winter's fast with medicated food wouldn't be a bad idea.

See, this case is interesting because you only had ONE fish affected. So it's not a good idea to barrage the fish with a million caustic medications when only one fish had a symptom and everybody else seems fine.

So you have the water testing to do in order to determine what pushed the one little fish into illness.

Then everything else you do should be SAFE, STRESSLESS, and PROPHYLACTIC.

*This message may contain specific, undefined and probably unfamiliar terms. Email consultation is best for developing "direction" and presenting concepts. Fish health related words which are foreign to you, or which need greater detail or explanation, can be typed in and "SEARCHED" at and

(Look it up!)



Fish disease problems? Need some help? The help pages take you through the basics of the 'fish health work-up' diagnosis method and basic fish disease treatment methods.

90% of all health problems and fish deaths are caused by poor fish keeping! The key pages are essential reading for all beginners and intermediates who are serious about disease prevention.

Expanded Content by Dr. Erik Johnson, and Used with Permission; Frank Prince-Iles ©2009 All Rights Reserved