Other Resources
Outbound Links

Koivet Had a Forum
Forum contents and participants have "gotten with the times" and moved on to Twitter, Instagram, Facebook.

Aquameds is a mid size provider of fish medications to the koi and goldfish resources you often turn to. They support their retailers as well as the hobbyist. They have a consultation form of great utility. Retailers can also contact them through their site,

Freezing alter the chemical properties of Formalin
Formalin that has been chilled to freezinf or near-freezing may form Para-formaldehyde.

Formalin Chilling Freezing Effects
Chilling Formalin - by Erik Johnson DVM
"Does freezing alter the chemical properties of Formalin when frozen, which would make it lethal?"
But, suffice it to say that when you freeze or even bring Formalin NEAR freezing it's chances of morphing into Para-Formaldehyde are about 99% but it doesn't always happen. Para-Formaldehyde is highly toxic to fish. I have an unfortunate experience with that. Actually several because I could not see through the bottle, and thus did not see the PF precipitate.
How could you tell? Well, if the Formalin has OPACITY or "white cottony stuff" in it - then it HAS made the change and IS toxic (lethally) to fish.
If you freeze Formalin or it gets near that temperature, and it does NOT go whitish or opaque, then it's still safe to use.
In other words, you can definitely tell by looking at it. "Bad" or chilled formalin will have whitish precipitate in it - and SHOULD NOT be used.
Good question

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.

Koi Beginner
Once you've leapfrogged through this tutorial you will have a solid, working concept of the Koi hobby and what it's all about. This is done just about exclusively with video and very little written material.
More than koi health, this site spans all things animal, by a real veterinarian who shoots you straight.

By Frank Prince-Iles. A UK authority who put this site together some time ago and which is still relied upon as a major source of good Koi and pond fish information

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.
koi ponds

If you need pet information AND Koi pondfish and pond information you might like DrJohnson.com which has everything from pet info, to vet info, to koi and pond fish. It has it ALL! Pet Information.

© 2013 all rights reserved koivet.com (drjohnson.com)