Back to Homepage: Koivet.comFor Mailorder of your Koi and Pond Pet Health Needs Product Testing and Discussion Dr Erik JohnsonA gentle introduction to ecosystem ponds with Dr. Erik JohnsonDrJohnson.com Koi Pond Fish Health Dr Erik JohnsonKoi Pond Fish Health Dr. Erik Johnson on YouTubeKoi Pond Fish Health Vet Dr. Erik JohnsonKoi Health & Disease: Everything You Need To Know 2nd Edition

Other Resources
Outbound Links



What should you feed your koi? How many times per day? Is Corn really that bad in a Koi diet? What are the most common feeding mistakes people make? What's the best food? Koifoods.com

Hydrogen Sulfide Facts and Myths

Hydrogen Sulfide - Not Very Common
Written by Dr. Erik Johnson
Hydrogen Sulfide gas is a gas produced in an-aerobic pockets under water. These may occur anywhere there is deep sand or sediment, or in a sump with thick mulm.
Without Oxygen, some bacteria can respire by using Sufur, and this creates Hydrogen Sulfide, H2S which is very, very toxic to fish.
HACH Chemical has a test for this, (1-800-227-4224) but this should be suspected in any case of fish loss where:
1) There are no parasites, proven by microscopy,
2) There are no real Ammonia or Nitrite derangements
3) The signs are respiratory and
4)The history has some reference to a stalled filter or the stirring of stagnant gravel or media.
5) NEUROLOGICAL signs, of spinning, flipping and fearlessness may be seen just before death occurs.
The smell is one of rotting eggs. Losses may be great and they will continue after the H2S is long gone. If you discover or suspect H2S poisoning, you should REMOVE THE FISH before disturbing ANY gravel or sand. Also, to neutralize SOME of the hydrogen sulfide, a weak dose of Potassium permanganate may be effective. Still, housekeeping, and finding the source of the anaerobic bacteria is the priority.
I've heard from a LOT of people that Aquascape ponds have Hydrogen Sulfide problems. I have tested dozens of these, especially the older ones since they are the most lored to have a problem - and have found NO H2S. My kit is the pad test from Hach. H2S is not an issue of pond TYPE but purely of pond maintenence.




Subscribe to our mailing list

*Indicates Required Field


HELP! Sick Fish!
Twenty Steps to fish health. You LITERALLY can solve almost any Koi or Pond health outbreak with these twenty diagnostic steps and nothing's hard. But it's not "here's your pill" either. Downloads are available.
DrJohnson.com
More than koi health, this site spans all things animal, by a real veterinarian who shoots you straight.

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

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.

© 2017 all rights reserved koivet.com (drjohnson.com)