Could you please explain what Flashing is?.......My Koi fish will occasionally jump or do little twists in the water....I always thought they were just this the sign of a disease though? I have an 8000 gallon pond with superb water quality.....thanks Paul Chapman

Flashing is a condition in which fish quickly lay over, then dash their sides against something in the pond. Often, they are trying to dislodge a parasite from their surfaces. In many other instances, they have been put into new water, water with a new pH, water with some Chlorine, or water with some other chemical irritant (high Ammonia levels for example.)

Flashing is normal in fish, when you see it once or twice per day per fish that would be 'okay' but if you see fish flashing two at a time in a pond it's more than coincidence and water quality, and CHANGES in water quality should be evaluated. For some people, it's simply the daily fluctuations in pH that cause the problem.

In other cases it's a parasitic issue. Several parasites cause profound flashing including but not limited to Costia, Flukes and Trichodina.

Quick Resources at a Glance

Please fill your contact information
Email   *
Select Mail Lists for subscribe : 
Dr Johnson's Wet Pets, Family Pets and Stuff For Vets List  - Newsletter opt in list for notices of interest to pond, pet and vet people.
Johnson Vet Services
Use this link to feedback for JVS services, staff, pricing, products, etc. For existing customers. Will not function as a means of consultation.
Doc's Book
"Koi Health & Disease" my second book title. It's a thick book with Koi and pond fish disease information and "how to" instructions on bringing Koi back to health. Digital copy from iTunes and Barnes & Noble with instant delivery, HALF the cover price.
Domain Names Available
I don't have a business selling domain names but there's ways to lease or use some of mine. Believe me, I can't fill them all!

Home Search Contact Best Buys Downloads

© 2009 All Rights Reserved JVS LLC Dr. Erik L. Johnson

CPA & Wealth Management Services to the Kennesaw / Townelake