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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,

Dissolved Oxygen for Koi and Pond Fish, What Levels are Good and How To Test
You can run these tests at home with the right gear. There are several test kits available and all are pretty affordable.

Oxygen

Oxygen is the final electron acceptor in the respiratory metabolism of the animal cell as conducted at the level of the cells' intracellular mitochondria. That's about all I know about it from memory.  Oxygen is soluble in water but not very well. Oxygen may rane from zero PPM up to a glorious 14 PPM. There are a range of concentrations which have different clinical presentations:

  • 3 PPM = Fish are dead and dying
  • 5 PPM = Fish are extremely lethargic. Ammonia is even more toxic at this level. Appetite is reduced or absent.
  • 7 PPM = Circulation and surface exposure of water could stand improvement. No fish will die unless something else impairs the gills or binds more oxygen (Such as Formalin application).
  • 8+ PPM are desirable
  • 11+ PPM are gloious. The hobbyist with this has dancing, playful fish.

But how could you know what your dissolved oxygen is? Well, there are chemical tests. One comes from Hach Chemical Call them at 800-227-4224

The diagnosis of a low oxygen condition is not as simple as you might think. Of course, if you have test kits or a testing pen, you're fine. But the problem comes when folks see a gasping fish and assume that there's an oxygen deficiency when indeed the fishes' gills are "shot" due to pH crash or some kind of parasitism.

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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.
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DrJohnson.com
More than koi health, this site spans all things animal, by a real veterinarian who shoots you straight.

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Fishdoc.co.uk
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

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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.
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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.

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