20 Gallon Tank Broken tail, betta fish

Caterpie

Hello!
I have a betta fish since like 1 and half month ago, and his tail was good. I just realized today his tail looks like broken or beaten. I paid attention to the decor and also to tank mates, so I have no clue of how this could have happened. Does anybody have an idea according to the pictures I posted? The tank mates are 4 albino corys and 6 neon tetras. So far I have never seen none of them messing around with the betta, I don’t know if an attack could have happened at night time while I sleep? I don’t know what to think.
Thank you!
 

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Rose of Sharon

Hi,

Pretty boy!

What are your water parameters? Water temp?

It looks like he could have a mild case of fin rot (the white edges). Either he has bitten his own tail or, more likely, the tetras have gotten after him if the decor is ok. Neon tetras can nip betta's fins.

I would start doing small, frequent water changes. You could also dose the tank with some aquarium salt for a few days to help promote healing, but don't use it for longer than 10 to 14 days.

Do you have a decent amount of plants? Enough to break sight lines?

That could help with the nipping.

Hope this helps!
 

ValkyrieLips

In addition to the questions asked, what size is the tank and what does your water change schedule look like?
 

Caterpie

I just realized the neon tetras are the guilty people in the scene :( sadly I just saw one of my corys with his eye almost out! I’m so sad, he’s just laying down and sometimes looking for food :( that’s when I saw one of the neon biting his fin. Should I return all the neon tetras?
I just checked the water and I have 0,25 ammonia and 0,50 nitrite and nitrate barely orange, because I believe I over cleaned the tank ;( I put some TSS+ to get the bacteria growing faster and back. Tank size is 20gallons.
 

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Fisch

Beautiful Betta!!
I still would have doubt that Neons nip on healthy fish, though they are opportunists and go after the weak.
We did not get a response regarding the frequency and amount of water changes, but as this is a new tank I would try and see if more frequent water changes (e.g. daily 10 -15 %) may help. In my eyes the Betta is a bit on the skinny side...how much and what are you feeding?
 

Caterpie

I change the water once a week 30%, the tank is new, like 1 and half month. I feed to the betta and the neon Flakes, but before I grind them with a tooth pick so they can have the flakes floating for longer on the surface and get 1 bite at once. I give them around 3 or 4 flakes depending on the size, once a day. To the Corys I grind and sink 2 pellets for bottom feeders on the sand side. Are there any changes I should do? I just saw the neon trying to attack the wounded Cory and the betta tail is all nipped. I don’t want all the fishes blinded and I still have warranty to return the neons :( I attached pic of general tank view. Help please :( this is so sad
 

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Rose of Sharon

So sorry you are going through this!

First, I would do the small daily water changes because of the ammonia and nitrites. Pristine water is the best medicine. The water changes will not affect the re-cycling of your tank. Then I would bring the neons back, specially because you are actually seeing them be aggressive. Maybe after a couple more weeks after the betta and cory have had some time to heal, you can look into some other non-agressive fish that will get along with your betta and corys.

These are just my recommendations. Hope it helps!
 

Fisch

I agree with Rose of Sharon....
For the whole view of the tank, if you can introduce more plant life in the tank, that may help to reduce the stress level as well. All recommendations are small, but as a whole they will help you getting through this phase. For feeding, you may want to increase just a bit and may add some frozen bloodworm treats to offer variety. Keep us posted....
 

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