Suspected columnaris infection, will her mouth heal?

ClumsyKnees

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Tank
What is the water volume of the tank?

5 gallons
How long has the tank been running?
7 months
Does it have a filter?
Fluval AC20
Does it have a heater?
Yes
What is the water temperature?
24°C
What is the entire stocking of this tank? (Please list all fish and inverts.)
1 betta, 10 pygmy corydoras, 1 nerite snail, some pest snails

Maintenance
How often do you change the water?

Every 1-2 weeks
How much of the water do you change?
About 1-2 gallons at a time
What do you use to treat your water?
Seachem Prime
Do you vacuum the substrate or just the water?
Vacuum the substrate

*Parameters - Very Important
Did you cycle your tank before adding fish?

Yes
What do you use to test the water?
API Master Test Kit
What are your parameters? We need to know the exact numbers, not just “fine” or “safe”.
Ammonia: 0ppm
Nitrite: 0ppm
Nitrate: > 5ppm
pH: 8.0
GH: unknown
KH: unknown


Feeding
How often do you feed your fish?

Once per day
How much do you feed your fish?
2-3 small betta pellets, but usually ~1mL of frozen foods (diluted with water)

What brand of food do you feed your fish?
Fluval Bug Bites, Hikari frozen foods
Do you feed frozen?
Yes
Do you feed freeze-dried foods?
No

Illness & Symptoms
How long have you had this fish?

10 months

QT Used….Yes/No, ……if Yes, how long?
No
How long ago did you first notice these symptoms?
2 days ago
In a few words, can you explain the symptoms?
She was hovering near the surface a lot. I looked closely and saw what appeared to be a fuzzy white patch near her mouth.
Have you started any treatment for the illness? Immediate water change. The tank has been dosed with Kanaplex 2 days ago at the onset of symptoms, and again today. 1 tbsp of aquarium salt. Seachem Stress Guard added daily. Seachem Pristine yesterday. Indian almond leaves.
Was your fish physically ill or injured upon purchase?
No
How has its behavior and appearance changed, if at all?
She was very active and exploring the tank the day before, swimming around and hovering with the corys. The day I noticed symptoms, she began hovering over her moss ledge nearly constantly, at the surface. The white patch near her mouth looks gone, but the tissue itself appears exposed.


Explain your emergency situation in detail.
(Please give a clear explanation of what is going on, include details from the beginning of the illness leading up to now)


This is a bit complicated. I had this particular fish in a different 5 gallon tank with a group of neocaridina. The tank she is in now previously had a different betta. The one who was in this tank passed away 3 days ago from dropsy. She had eaten a shrimp that was quite large in comparison to her size, and I suspect she ended up with an intestinal blockage and subsequently dropsy. I did not have reason to suspect columnaris at the time.
After the passing of that fish, I decided to remove all the shrimp from the tank, and move this betta into this tank. I had done a water change and checked parameters after the other fish passed. The first day in the tank, this betta was happy and exploring the tank, eating well, and getting to know her new cory tank mates. The next morning she had a fuzzy white spot near her mouth and was staying near the surface. I did another water change, and dosed the tank with kanaplex, and added 1 tbsp of aquarium salt. It no longer looks fuzzy, so I'm hoping the infection is under control, but it looks like her upper lip is missing. She is still eating (daphnia and baby brine shrimp) in small amounts, but is definitely having a hard time with it.
I have seen a few similar posts here and on other forums, but I'm wondering if anyone has dealt with something similar and has an idea how much of her tissue I can expect to heal.
 

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Your Betta might survive the "Mouth Rot" aka Columnaris, but all tissue destroyed by the bacteria will not regenerate.

The antibiotics dissolved in the water column will likely have little effect on the Columnaris bacteria.

Medicated foods would probably work better.

The Betta might heal up naturally if the water is kept clean, but as noted the damage caused by the bacteria is permanent.
 

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  • Thread Starter
  • #3
Your Betta might survive the "Mouth Rot" aka Columnaris, but all tissue destroyed by the bacteria will not regenerate.

The antibiotics dissolved in the water column will likely have little effect on the Columnaris bacteria.

Medicated foods would probably work better.

The Betta might heal up naturally if the water is kept clean, but as noted the damage caused by the bacteria is permanent.
So in the case that the damaged tissue does not regenerate, could I expect any decent quality of life? She has been looking a lot better today, swimming around a bit rather than just laying at the surface, good appetite.
If her condition doesn't improve much from here, is it humane to let her live like this?
 
Over the years, I've had a couple of fish that survived mouth rot. The bacteria destroyed most of the mouth tissue, which left a gaping hole.

Both lived a less than normal life. Eating was a little more difficult. A gaping hole for a mouth isn't pleasant to look at.

If it becomes obvious the Betta is suffering, euthanizing would be a logical choice.
 
  • Thread Starter
  • #5
Over the years, I've had a couple of fish that survived mouth rot. The bacteria destroyed most of the mouth tissue, which left a gaping hole.

Both lived a less than normal life. Eating was a little more difficult. A gaping hole for a mouth isn't pleasant to look at.

If it becomes obvious the Betta is suffering, euthanizing would be a logical choice.
Thank you for your insight, I appreciate it.
 

Random Great Topic!

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