Bn pleco has Cottonmouth or something else??

Tank

What is the water volume of the tank? 20g
How long has the tank been running? Half a year
Does it have a filter? Yep
Does it have a heater? Yep
What is the water temperature? 76
What is the entire stocking of this tank? (Please list all fish and inverts.)

Maintenance
How often do you change the water? Once a week
How much of the water do you change? 40-50%
What do you use to treat your water? Tetra aquasafe plus
Do you vacuum the substrate or just the water? Just water

*Parameters - Very Important
Did you cycle your tank before adding fish? Yep
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 and nitrite 0, nitrate 10.

Ammonia: 0
Nitrite: 0
Nitrate: 10
pH: 8.2

Feeding
How often do you feed your fish? Once a day
How much do you feed your fish? A small pinch
What brand of food do you feed your fish? Fluval tropical bug bites and tetra flakes
Do you feed frozen or freeze-dried foods? No

Illness & Symptoms
How long have you had this fish? It ranges from 3 months to a year
How long ago did you first notice these symptoms? Yesterday
In a few words, can you explain the symptoms? White fuzzy stuff on a glass catfish and my bn plecos nose turned white
Have you started any treatment for the illness? Not yet, planning to medicate with something for fungus
Was your fish physically ill or injured upon purchase? No, although my bn pleco may have a skull deformity
How has its behavior and appearance changed, if at all? Behavior is normal, her (pleco) nose and a patch on her face have turned white. The glass catfish’s lips have fuzzy white stuff on them.

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) In my 20g I have a Mexican dwarf crayfish, a krib, a Female bn pleco, 3 glass catfish (will be 6 soon), two guppies, and a platy. Awhile ago my glass catfish started to get a white lump on his lip but he kept moving around so I never realized it was fuzzy. I didn’t really examine him that close since none of the other fish were showing symptoms and he was acting and eating fine. Well, recently my bn pleco jumped out of the tank and she was recovering in the 20 since she was very stressed and in my 55 I have a male bn pleco since I was/am going to breed them.
Yesterday her nose and a patch on her face turned white, no fuzz but it just turned white. I’m thinking this is a beginning stage of cottonmouth and she caught it from the glass catfish since she wasn’t in great Heath (jumped a few days ago).
Before the white turned up her nose and where the patch was turned blue. Do you think it’s cottonmouth or something else? Also, what should I use to treat it and should I treat my 55 as a precaution even if none of the fish are showing symptoms?

 

Here’s a picture and as of now none of the other fish besides the glass cat have the white stuff. Even when her stress spots/areas go back to normal that stuff on her face remains. Please help! I don’t want to lose her!

 

Hi, I don't have too much experience with this. I'm giving you a bump in the hopes that you get some help!

 

Hi, I don't have too much experience with this. I'm giving you a bump in the hopes that you get some help!

Thanks for the bump! I’m still very confused on this but now I think it’s bacterial since she jumped out of the tank and could have picked up some sort of bacteria?

 

Can you post a picture of the other infected fish? The pleco looks more like a bacterial infection or an abrasion than a final infection to me. I would keep an eye on her and keep the water very clean with water changes to promote healing.

 

Can you post a picture of the other infected fish? The pleco looks more like a bacterial infection or an abrasion than a final infection to me. I would keep an eye on her and keep the water very clean with water changes to promote healing.

It’s hard to get a pic of the glass cat since they’re camera shy but I’ll try, here’s the best I’ve got

 

Update: it seems to have gotten thicker in one area but by the looks of it it is going away in another. No other fish have gotten infected, nor has she shown any abnormal behavior. She’s doing very well but I’m still worried about what I should do. Should I leave it since it seems to be going away in one area or should I figure out how to treat her and begin treatment?