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Discussion Starter · #1 ·
My betta Valentino had a little bump near the base of his tail a couple days ago, and it's now an open sore that I'm pretty sure is an ulcer.
He's never had any health problems before, and the only thing I can guess that would have caused this is the stress of moving into a divided tank?

How can I clear this up for him?
 

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Are you sure that the other fish on the other side of the tank isn't biting him through the divider? My friend had that happen to multiple fish, apparently one of her boys goes straight for the organs when biting a fish through the divider and he's killed a few fish like this and some are just healing up now. Just a thought is all.

You can take him out to treat him a few days with Aquarium Salt, this will help sterilize the wound and hopefully keep off infection. You can use 1 teaspoon per gallon, let me know if you've ever used salt before and I can guide you on dosing it if you need it.

But in all, I'm not sure if there is a real way to treat an ulcer other than keeping it clean and void of infection so it doesn't cause other issues. This is one of the issues with keeping small fish, we can't really treat any tumors, cysts, ulcers, or pigment buildup's because they are just too small to really handle.
 

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Discussion Starter · #3 ·
Okay, thank you! I don't think it really could be that his neighbor is biting him, because the divider is a store bought one with very tough fine mesh. I don't see how they could bite each other, but it may be possible.
I will set up a quarantine tank for him though :)

Thank you :)
 

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Okay! Right, sorry I didn't ask what divider you had, I just assumed it was the regular craft mesh ones we frequently use for DIY dividers :) But sterilizing the wound should help out. Pictures will still help though, do you have any?
 

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Can you post some photos of the ulcer? That would be very helpful. (We'd be able to see how large it was, how deep, if there's any signs of infection, etc.)

Also, can you fill out the form below so that we have more information? Answer what you can, and leave anything else blank.

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Housing
What size is your tank?
What temperature is your tank?
Does your tank have a filter?
Does your tank have an air stone or other type of aeration?
Is your tank heated?
What tank mates does your betta fish live with?

Food
What type of food do you feed your betta fish?
What BRAND of food do you feed it?
How often do you feed your betta fish?
How MUCH do you give at each feeding?

Maintenance
How often do you perform a water change?
What percentage of the water do you change when you perform a water change?
What type of additives do you add to the water when you perform a water change?

Water Parameters:
Have you tested your water? If so, what are the following parameters?
Ammonia:
Nitrite:
Nitrate:
pH:
Hardness:
Alkalinity:

Symptoms and Treatment
How has your betta fish's appearance changed?
How has your betta fish's behavior changed?
When did you start noticing the symptoms?
Have you started treating your fish? If so, how?
Does your fish have any history of being ill?
How old is your fish - OR - How long have you owned it?
 
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