Cory With Cotton Mouth?

[molver]

Hi,
 
I got two corys a couple of days ago to accompany my 3 older corys.
 
I think one of them has cotton mouth, but I'm not sure. Its lips are white, and it's extremely still (just swaying in the current).
 
I attached a picture, can someone please confirm?
 
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Tank size: 20 gallon long
pH: 
ammonia:
nitrite:
nitrate:
kH:
gH:
tank temp: 80 degrees farhenheit

Fish Symptoms (include full description including lesion, color, location, fish behavior): Not moving, white mouth. Barbels seem to be shortened (cut off almost).

Volume and Frequency of water changes: more than 25% weekly

Chemical Additives or Media in your tank: None. Treated with Pimafix for a week because of an earlier outbreak of cotton mouth. Stopped the treatment 4 days ago. 

Tank inhabitants: Molly, Swordtails, Neon Tetras, Betta fish, Ghost Shrimp, Otocinclus, Corydoras

Recent additions to your tank (living or decoration): Hygrophila plant (or something like it). Betta fish. The two corys.

Exposure to chemicals: none

Digital photo (include if possible):   

It's obvious he's sick. What should I do??

Should I go again with the Pimafix?

 

[WILDER]

Bless Him.
Can you isolate.
I would use Maracyn Plus, or tetracycline.
Pimafix is no good i'm afraid.

 

[Lillefishy]

That looks like a secondary infection caused by the barbel loss, as Wilder said, try the Maracyn.
Barbel loss can be caused by sharp substrate, dirty substrate or constantly high nitrates, once they're damaged it leaves them open to infection.

 

[DoubleDutch]

Agree.
 
Think the substrate isn't very suitable for this Trilineatus as well. Don't think it damages the barbels directly, but foodparts can / will be unreachable. Decaying food can give bacteria a chance !!!
Keeping Corys at gravel (smaller than this) and sand.

 

[molver]

I think I just happened to get him like this. It's dark in the store, so it's hard to tell. But I noticed that his barbels aren't like the others' as soon as I brought him home. I got him after my other corys. Those corys are fine and happy. 

 

[DoubleDutch]

Okay. Good chance it caught it in the LFS (or before).
 
I don't know Pimafix, but is it a antibacterial med?. I'd give a good antibacterial med a try.

 

[star4]

Your best chance is to isolate him/her in a bare bottomed tank, that gravel you have now will make it worse.

 

[molver]

I took him back to the pet store. I don't have all the equipment you all recommend to make him better, so I thought he'd have a better chance at the pet store than with me.

Okay. Good chance it caught it in the LFS (or before).
 
I don't know Pimafix, but is it a antibacterial med?. I'd give a good antibacterial med a try.

Pimafix is actually a fungal treatment my API. Melafix would be the antibacterial med that API sells.

 

[DoubleDutch]

Ahh thanks Molver. I'd definitely go for anti-bacterial, but think Melafix (which I imported from the UK haha) isn't strong enough. To me that's for minor injuries aso. This needs "serious" treatment.

 

[WILDER]

Thank you for the update.
I would preform some water changes for a few days on main tank.
 
Good Luck.