Koi Health Textbook by Dr Johnson

Smart pond experts "bone up" on fish health so they don't have to say "Uhhh I don't know"
Smart pond experts “bone up” on fish health so they don’t have to say “Uhhh I don’t know”

Folks ask me all the time, what’s new in the new book? If I already have the first edition, should I buy the second edition?

The answer to the question is YES. The reason you should get the second book is because your first edition is probably rather worn by now. Plus, WE DROPPED about 70 pages of dated information from the first edition and replaced it with 90+ new pages of edited, revised and updated information. The book is now 204 pages long!

And, while it’s thicker than ever, it’s the same price as the first edition was even ten years ago! Isn’t digital publishing great! “Koi Health & Disease Reload” is $39 per copy.

We REDUCED the font size, and improved the page layout to fit in MORE information but it STILL ran about sixty pages more than the old book.

New information: Almost everything was massaged, revised for accuracy, and we added notes of interest from the field garnered from the last ten years of practice of fish health. So everything was updated, and we added expanded information on:

Koi Health & Disease Is a "How To" Reference based on 10 years of veterinary practice on Koi
Koi Health & Disease Is a “How To” Reference based on 10 years of veterinary practice on Koi

Nutrition, handling, laboratory techniques, bacterial infections, Koi Herpes Virus, SVC, Tricide Neo potentiated anti bacterial dip, Praziquantel in its current usage, pond predators and much, much more.

We also added improved images. We went back to the source code on some of the original images and retouched them then we put them to digital publishing on high resolution printers and paper.

By the way, the paper and binding are top notch. This isn’t copier paper simply perfect-bound. This is heavy 65lb paper with a nice square, ‘real book’ binding.

>>> Order Now – “Koi Health & Disease 2006 Reload” is $39 per copy.

Readers are saying:

“EXCELLENT FOR BEGINNERS…Without sacrificing plenty of depth where needed… a Koi keeper’s bible!” – S.G., Ontario

“This book goes into extreme detail and gives you STEP by STEP instructions on how to save fish lives under a hundred different conditions.” – Dr. Erik Johnson

“I received your book last week and have almost completely read it cover-to-cover. I’m very impressed with its content and the excellent balance between practical and technical information. If more Koi keepers owned this book, I’m sure there would be many more healthy Koi swimming today!” – Shooterdog”

“I’m very happy with “THE BOOK” A better book doesn’t exist in Belgium. —- Greetings!” – M. Demol

What It’s Good At:

Step by step, recipe-type instructions on how to navigate through a disease outbreak. We offer the fastest shipping available anywhere on this book, and a great price. Even a stockbroker with no science background could save his or her fish with this manual.


Simplicity without being simplistic. Almost anyone can understand how to recover their fish from an outbreak with the proper diagnosis and care recommended in this book


Images throughout book are very clear grey scale photographs, but not full color

Frequently Asked Questions

Q: Does this book help with Goldfish, too?

A: Oh yes. When I did the Weatherhill Goldfish book (also sold on this site) they pared out a fair amount of the dosing stuff. So Koi Health & Disease remains the last word on the “how to, step by step” and all you do, with just a couple of exceptions, is use the word “Goldfish” in place of “Koi”. Injections, baths, dips, most other diagnostic and pathophysiology issues are directly correlated. Formalin and Supaverm are notable diversions but Supaverm is not in the book in it’s current edition. ~ Dr. Erik Johnson (koivet.com)

Q: If I wanted to buy 40 copies of Koi Health and Disease for our club, would you be able to reduce the price? NM – Washington Koi & Water Garden Society

A: Simply email us, our customer support leader and we will make arrangements on a wholesale purchase of these items. You’d be surprised what you could buy at extremely favorable club prices when you achieve a ‘dozen’ pack order.

>>> Order Now – “Koi Health & Disease 2006 Reload” is $39 per copy.


Koi Health & Diseases is an incredible guide to koi problems. I have raised koi for ten years and lost a lot of them due to my ignorance. I can not express what a great guide Koi Health & Diseases is. I sat down and read the entire book when it came, nodding at the observations and realizing, “Yep, I made that mistake, yep, I did that too”. It should help me to avoid mistakes in the future. Thank you for sending it.

T. Hicks

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This is The LCD Screen Scope
We Did The Tutorial With. I did a twenty page tutorial (Here's the tutorial) with video, audio, images and even little parasite movies to show you how to use a microscope. 

This Filter is Good For BIG Dirty Tanks
I've been wrestling with water quality with the turtles. The sponges work GREAT, but in THOSE turtle systems where they eat MICE the poops are bulky. This filter can handle it. In "Tortu's" tank, it's got an 800 gph pump and it rocks. 

PraziPro for Flukes
They nailed it. Figured out the solubility and worked out the dosing. It works. 

Buy Some Good Koi?
No, this isn't really for the 'high end' collector y'all. But for someone who isn't near a decent garden center, here are "good-to-quite-good" Koi you will like at a very good price. I know these guys personally.

Best Food, Ever
It's made for (and I discovered it for) my Blood Parrots but the small size, intense color enhancers and excellent formulation make it superb young-Koi food. Oh, and it's AMAZING on color-cichlids like Flowerhorn and Blood Parrots. 

Pro Air 60 Aerator is a VERY high output air pump pushing my whole fish room (17+ drops), and I have one at home driving everything there, and I have one as a back up. 

Formalin Malachite (Not dilute)
There are formalin malachite preparations at 10%, 22% and 37%. There's economy in the concentrates. Hard to get Prime shipping because air transport is curtailed. This is a good value on 32 ounces. 

Topical For Koi and Pond Fish Ulcers
I like 7% tincture of iodine because it stains but it's hard to hurt anything with it. Used with a WOVEN gauze, this works well to clean and disinfect a wound. Only use ONCE. Do not 'repeatedly' scrub wounds. 

Confectioner's Glaze 
Is the way to bind a medication to fish food. Gone are the days of paste food and oil. The write up is done, it's RIGHT HERE.

Koi Health & Disease
Hopefully this link takes you to the newest edition by PRIME to get it to your house the fastest. 

I have over ten of these Titanium Heaters in my fish room and at home. They're a paradigm shift in aquarium heating. They're titanium and 400W for under $30! Whaaaaaaaaat?

CyroPro by Hikari is safe and easy for Anchor Worms and Fish Lice.

Whatever heaters you use, back yourself up with a temperature controller, it'll turn on, and off your heaters. If your heater seizes "on" at least the thermostat will stop a tragedy. 

LifeGuard by Tetra is a tablet version of a tame 'chloramine-t' or 'halamid' compound that's easy to get and good on bacterial infections, in baths. 

If you're making medicated feed for a larger group of fish, this will come in handy. Dosing is available in the site. 

For me, filtration-of-choice
For aquariums, even small Koi holding facilities or small ponds. These sponge filters are cheap, easy to clean, and they clear hazes very well when used with some Accuclear or similar.

Rubber sided, round, nettable tanks
Make great hospital or quarantine facilities. They SHOULD cost about $200-300 depending on size, but this, lower quality unit (while panned in some reviews) may be good. Don't overfill and make sure it's propped up.

1200 Watt heater, on a thermostat held securely above the waterline, works GREAT as a large tank heater. That's all I'll say because there's risk of electrocution and all that. But then, even in a bucket you could get killed. Sound like fun?
I have several of these ALLIED PRECISION stainless ones that are a couple years old. Working still. 

Potassium Permanganate 
500 grams could be a lifetime supply but it's 50% more than the 100g cost wise, for 500% more amount. Dosing is in the site and the book.

What Does Ajax Eat?
I looked for something well formulated, with meat as the first ingredient. Something UNDER $2/lb and something they could deliver for free. And this was it. He looks and feels great on it.