Koi & Pond Water Care

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Pond Water Quality

Pond Ammonia
Pond Nitrite
Pond Nitrate
Pond pH
Pond pH Crash
Pond Dissolved Oxygen
Pond Hydrogen Sulfide
Pond Water Changes
Pond CO2

Parasites Main

Koi Flukes
Koi Trichodina
Koi Costia
Koi Chilodonella
Koi Ich
(White Spot)

Medications Main

Potassium Permanganate
Chloramine T

Shotgun Remedy

Feeding Koi

Go Green 100% Natural Aquameds

The New Generation of
Beneficial Pond Bacteria
100% Natural
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Pond Care Treatments

Deadly Bacteria Control
Remove Bottom Sludge
Remove Ammonia Spikes
Control Organic Growth
Maintain a Healthy Pond
Winter Pond Care

Pond Hydrogen Sulfide

Hydrogen Sulfide gas is a gas produced in an-aerobic pockets under pond water. These may occur anywhere there is deep sand or sediment, or in a sump with thick mulm. The key elements in Hydrogen Sulfide elaboration by hazardous anaerobic bacteria are still water, deprivation of oxygen in deep media, and time. Lots of time.

Koi ponds with more than a few inches of gravel on the bottom will develop noxious gases including methane, Hydrogen sulfide and toxic levels of Carbon Dioxide.

Without Oxygen, some bacteria can respire by using Sulfur, and this creates Hydrogen Sulfide, H2S that 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 koi fish loss where:

1) There are no koi or pond fish parasites, proven by microscopy,

2) There are no real Ammonia or Nitrite derangements

3) The signs are respiratory, the koi fish are gasping at the surface

4) The history has some reference to a stalled filter or the stirring of deep, stagnant gravel or media.

The smell is one of rotting eggs. Losses may be great and they will continue after the H2S is long gone.


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Fish Medicine
Learn about fish medicines, what they do, and where to get them.

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 Crisis has a symptoms chart by system you can choose the symptom by fish part, and resolve a lot of Koi pond fish problems or at least, learn about them understand how to remedy them.

Koi Food & Feeding
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? Help With Koi Problems