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super clean water. 50% water changes 2 x a week. The natural healing process takes a long time compared to how quick the damage was done.

Now think, finrot is due to stress... what caused it? Think long and hard and eliminate that cause or that fish is doomed
 

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Assuming the issue is the centre potion of the caudal fin (tail fin), there is no sign of fin rot.

Nipping may be involved, and Jeff asked for more data on the tank including other fish, so that will help.

Other things can also cause this. But without data we are just guessing.

Byron.
 

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Discussion Starter · #5 ·
I have 6 angels 3 lyretail swordtails and 2 emerald catfish nobody get bullied in my tank its a 75 gallon planted not many but some and working on getting more
 

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I have 6 angels 3 lyretail swordtails and 2 emerald catfish nobody get bullied in my tank its a 75 gallon planted not many but some and working on getting more
I don't know that fin nipping comes across necessarily as bullying... it's just a light snack. Swordtails could do that if they were all males... no females to pester.

On a separate note, only because I don't have any experience with fin rot, I'd suggest adding more cats. They really should have 6 or more.... and in a 75, the more the merrier. I have nine Emeralds in my 37gallon. I'd have more but I'm bumping my fish loading once they all grow up.

Jeff.
 

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Discussion Starter · #7 ·
Oh trust me if i could get more i would nobody aroubd me has them the ones i have were the only 2 my lfs had and cant get more =[ and my sword tails are 1 male 2 female so i dont think its them ...i have no fungus i do 25% w/c every sunday what should i do aboyt the tail splitting?
 

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The "nipping" may well be from the angels themselves, or the swordtails. This may be physical "biting," or it may be due to stress without any actual physical interaction. Fins will split due to stress. I have had it occur within characins.

There is no fin rot here, as I mentioned previously.

And I agree, increase the catfish, they ned a group of five, and three more will be fine.

Byron.
 

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Are there pieces missing or is it just split? How many have this? Just the one, some or all?

I had to order my catfish, wild caught from Peru. I doubt there are any tank raised. My LFS manager keeps them, knew what I was talking about, really liked them and brought in 50.

Jeff.
 

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Now today my all black angels tail is splitting i dont kno what im doing wrong plz help i dont want the to die
This alone and of itself is very unlikely to kill the fish. I have as I mentioned seen this with characins, and the fish live for years. Black Phantom used to get this, and Rosy tetra, others too.

However, all possibilities for the cause should be investigated in case there is something causing this that could worsen. We have mentioned aggression, which is the most likely. Sit in front of the tank very quietly for an hour. Once you are quiet, the fish will forget your presence and behave more "normally." Watch closely for any chasing, nudging, nipping, swords sneaking up behind the angel, etc. I'm quite serious about being absolutely still; any movement will cause the fish to think about what is going on outside, and feeding will pop into their heads, or predators, and they will not behave "normal."

Second though is water quality. Have you tested for ammonia, nitrite, nitrate, and if so, what are the numbers? What is the pH? And the GH? And the temperature?

Byron.
 
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