Red, discolor caudal fin - Tropical Fish Keeping - Aquarium fish care and resources
 
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post #1 of 4 Old 06-28-2013, 03:55 PM Thread Starter
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Red, discolor caudal fin

Hi,

I have 2 Golden tetras with red, discolor (blackish) caudal fin but not all the time
One day it's red then the next day it's gone or even red in the morning and normal on the evening
Do you know what is going on?
The 2 tetras are aggressive and sometime hiding behind plant then chasing other fish when they get closer
Ammonia 0, nitrite 0 and nitrate 5
Thank you

Eric

36g Bowfront Planted
11 Cardinal Tetras (Paracheirodon axelrodi)
11 Gold Tetras (Hemigrammus rodwayi)
4 Julii Corys (Corydoras julii)
3 Panda Corys (Corydoras panda)
Amano Shrimps, Malaysian Trumpet Snails, Pond Snails

20g Long Planted
Red Cherry Shrimps, Tiger Shrimps
Malaysian Trumpet Snails, Pond Snails
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post #2 of 4 Old 06-28-2013, 10:16 PM
it could be finrot. is it the tips of their fins, or the entire fin?
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post #3 of 4 Old 06-28-2013, 11:06 PM Thread Starter
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It's the beginning of the fin, the tips are fine

36g Bowfront Planted
11 Cardinal Tetras (Paracheirodon axelrodi)
11 Gold Tetras (Hemigrammus rodwayi)
4 Julii Corys (Corydoras julii)
3 Panda Corys (Corydoras panda)
Amano Shrimps, Malaysian Trumpet Snails, Pond Snails

20g Long Planted
Red Cherry Shrimps, Tiger Shrimps
Malaysian Trumpet Snails, Pond Snails
ERICVANCOUVER is offline  
post #4 of 4 Old 06-29-2013, 06:09 AM
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Could it be stress? Some of my fish darken up quite a bit when they're a bit stressed out - usually during water changes.

Animal testing is a terrible idea; they get all nervous and give the wrong answers.
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