Emergency Fish Kills

Let’s hope that it never happens to you. You walk out to feed the koi and goldfish. Many of them are floating on top, dead. Many more are in distress.

Emergency Steps

If your fish are dying — don’t panic. Follow these steps immediately:

Perform water tests — ammonia / nitrites / pH / oxygen levels

Make notes of live fish behavior

Remove all dead fish

Perform a 50% water change

Remove plants and perform a salt treatment

 

Water Tests

Please have test results handy when you call us. There’s very little we can do if water tests have not been performed. The ammonia should be 0. So should the nitrites. pH should be between 6.8 and 8.0 though we’d prefer they be at 7.0 to 7.5.

Fish Behavior

Are they gulping for air? Are they swimming properly? Spiraling? We’ll also need to know what was done to the pond, if anything, that could attribute to the problem. Is there any film on the water or does the water feel strange?

Dispose of Dead Fish

Unless you’re willing to take the fish to a University for an autopsy, there’s nothing we can draw from a dead fish. Do note if the eyes look sunken, if there are any apparent ulcers, if the skin is peeling or if the fins are ragged. Get them out quickly. They will trash the water quality.

Perform a Water Change

Chances are something is wrong with the pond environment even if all water tests indicate no problem exists. It could be run-off or over-spray from insecticides or low dissolved oxygen levels in the pond. Either way, it does no harm to perform a water change. Do NOT forget to add de-chlorinator if you are using tap water which is most often treated with chlorine.

Perform a Salt Treatment

Non-iodized, pure salt is inexpensive and so effective! Once you have changed your water out put in 3 lbs. of non-iodized, mineral-free salt per 100 gallons of water. This will encourage the production of the fish’s protective slime layer by natural means. We do not recommend using any product that artificially produces a slime coat, especially during an emergency. It will coat the fish’s gills also taxing it’s ability to breathe.

Emergency First Aid Kit

Here’s what you should always have on hand just in case:

Non-Iodized Salt

De-chlorinator

pH Test

Ammonia Test

Nitrite Test

Hydrogen Peroxide

Parasite Pak

Symptom

Indication

Action

Hanging out by water return

Not enough aeration / parasites / gill infestation

Add aeration / check gills for damage & disease / check water parameters / Treat for Parasites

Gulping air from water’s surface

Not enough aeration / parasites / gill infestation

Add aeration / check gills for damage & disease / check water parameters / Treat for Parasites

Hiding / alienating itself from others

Health problem is definite

Check fish for symptoms

Clamped fins

Health problem is definite

Check fish for symptoms

Flashing / rubbing against side or bottom

Parasites

Treat for Parasites

Whites turning red / red streaks

Fish highly stressed / water parameters could be off

Perform water parameter tests

Not eating when it should be hungry

Health problem is definite

Check fish for symptoms

Bloating / scales popping out / bulging eyes

Dropsy

Prognosis is death / separate if open sores exist / make him comfortable

Head hanging

Parasites / bacterial infection

Check fish for symptoms / Treat for Parasites

Sores / ulcers / deteriorating fins / red mouth

Bacterial infection

Chemotherapy water treatments or antibiotic injections / feed antibiotic food

Skin peeling / Oranda heads eaten away

pH crash or too high

Lower or raise pH & stabilize

 

Before You Pick Up the Phone to Call...
We do not have a crystal ball and we cannot diagnose any fish health problems over the phone!  Don't waste your time or ours with a phone call unless you are prepared to treat your pond as if you know it already has parasites since they are the root of most of the fish health evils!  Have your testing done.  We'll ask if you have tested for ammonia, nitrites and pH. 

 

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