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Gill Disorders
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Symptoms
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Cause
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Treatment and Links
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A). The gill filaments are light,
having lost color |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Has the pH changed?
Is chlorine in the water?
Is ammonia in the water? |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Establish optimum water values. Check pH,
and Chlorine. Use
Aqua Gold. |
![If not, look down the chart further](images/if_not.gif) |
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![If not, look down the chart further](images/if_not.gif) |
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The fish can be affected by a Kidney Disease |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat fish with
TMP Sulfa -or-
Erythromycin. |
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B). Small white objects (1 to 1.5mm)
are attached to the gill filaments. They hold very tightly |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Gill Crustaceans |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat the fish with
De-Los and
Methylene Blue. |
![If not, look down the chart further](images/if_not.gif) |
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C). Blood-red worms are visible on
the inside surface of the operculum (gill plate), but usually
only in pond fish |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
The fish are affected with blood worms
(Philometra spp) |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat the fish with
De-Los |
![If not, look down the chart further](images/if_not.gif) |
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D). Light flecks appear on the
gills. The gill filaments are necrotic at this spot |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Eggs of the blood fluke Sanguinicola spp are
involved. If fungal hyphae are seen in the slides, then
gill rot is involved |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat with a bath in
Acriflavine Neutral. |
![If not, look down the chart further](images/if_not.gif) |
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E). Are the gills flecked with
grey-white. Do the filaments keep falling out? |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Branchiomyces fungal gill rot |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat with
Forma-Green |
![If not, look down the chart further](images/if_not.gif) |
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F). Cotton-like threads grow on the
operculum (gill plate) or gill filaments |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Saproglenia fungal infection |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat with:
Forma-Green -or-
Acriflavine Neutral. |
![If not, look down the chart further](images/if_not.gif) |
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G). Breathing is rapid, one or both
opercula (gill plates) are open, and the fish rubs itself around
the gills. The fish hangs below the surface and gulps for
air |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
The fish is affected with gill worms or gull
flukes |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat with: Praziquantel
for marine fish or
De-Los for freshwater fish |
![If not, look down the chart further](images/if_not.gif) |
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H). The gill filaments appear
slightly cloudy, even whitish on the surfaces |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Your fish are affected by a Protozoan Infection |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat with:
Metronidazole and
Methylene Blue. |
![If not, look down the chart further](images/if_not.gif) |
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I). White dots appear on the gill
filaments. The dots measure 0.5mm in freshwater fish and
to 1mm in marine fish |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
An Ichthyophthirius or Cryptocaryon disease is
beginning to spread |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat with:
Forma-Green -or-
Copper Sulfate. If marine cryptocaryon is resistant to
the above treatments, use Quinine Sulfate |
![If not, look down the chart further](images/if_not.gif) |
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J). Small, white modules appear on
the gill filaments and cannot be removed |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Most likely, sporozoan cysts |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
No suitable treatment known. |
![If not, look down the chart further](images/if_not.gif) |
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K). The gill filaments swell up,
becoming slimy and stick together |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Chemical factors may be involved |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Change the water and filter over fresh,
activated charcoal. |
![If not, look down the chart further](images/if_not.gif) |
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![If not, look down the chart further](images/if_not.gif) |
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Are the fish affected with gill worms or flukes? |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat fish with
Praziquantel in marine tanks -or-
De-Los. in freshwater aquariums & ponds. |
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![If not, look down the chart further](images/if_not.gif) |
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The fill filaments break up from the tip on.
The cartilage remains a little longer. Bacterial
gill rot caused by Columnaris bacteria |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
Treat the fish with
Acriflavine Neutral |
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L). The gill filaments are very pale
pink |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
The fish is anemic, which often occurs following
severe kidney damage or infection by blood flagellates |
![Fish Behavioral Disorders Flow Chart](images/if_yes.gif) |
No suitable treatment known. |
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