ADF, white fuzz around eye & mouth

I purchased 4 (seemingly) healthy ADF's from my local PetsMart.
They were quarantined for two weeks as I cycled a planted 10 gallon tank for them.
I've used Seachum's "Stability" to help establish the tank, and water parameters are good (I also have a filter, air stone, and heater - temp at 78°).
The tank has only the ADF's; no fish. I noticed 1 out of the 4 is always at the surface. She's perched herself on the top of my thermometer (1" below surface), and seems to be trying to climb out, having almost half her body out.
Finally getting a closer look at her tonight (she dove in when I turned the tank light on), it seems she has a pimple/sore on the left side of her face. In the pictures it looks like her left eye is cloudy, and there's white stuff around her jaw. She has somewhat of an appetite, but not like the others.
What is this? Any thoughts/suggestions as to what I should do?
Wondering if I should quarantine and/or medicate. The other 3 seem quite happy and lively in the planted tank, with no visible issues. I'd love to add a couple fish to the tank, but I want to make sure the ADF's are healthy first. Help!

 

The ADF could be shedding which they do periodically. They also often eat the shed skin.

ADFs (as with fish) can reach us in less than perfect condition but this one looks reasonably OK to me.

 

Hmm... I have read a bit about their shedding. I find it weird that it just seems to be around her face and one eye. Today, she showed no interest in eating when I fed them. She is slightly larger in overall size then the other 3, but has quite a round belly. She is also a little aggressive towards the other ADF's.

Update photo

 

I posted the other night, but I can see things are slowly getting worse. One out of 4 frogs seems to be a lot more full, or borderline bloated looking. She's got a fuzzy white cloud around her mouth and one eye. She's also got two red sores on either side of her mouth/neck, a red spot on one of her front toes, and what almost looks like ringworm in the webbing between two back toes. She seems to be getting worse each day. She's spending a lot of time floating at the surface or trying to climb above the waterline. She also refused dinner last night. Help!

 

what are your water parameters Ammonia/Nitrite/Nitrate/Ph, seems you might have a problem with your ammonia

 

Hmmm. When only one eye is cloudy it's usually due to some type of mechanical damage, but her other symptoms are consistent with a bacterial infection. Trying to climb out of the water and loss of appetite makes me wonder if there wasn't some ammonia involved, but the others would affected as well, so I'm going with bacterial infection. I would go ahead and treat her with an antibiotic like Tetracycline or Kanaplex, preferably in a heated but bare bones hospital tank or container. It's not contagious, just easier to treat that way, and doesn't expose your biofilter or tank mates to unnecessary medicating. Just follow directions on the package, and run an airstone to keep the water well oxygenated. Good luck and keep us posted.

 

Thanks for the responses
Tank parameters are good, my pH is slightly lower then the ADF's like (6.0), but the other 3 frogs are great; active, hungry, good colour, and no (obvious) skin issues. I've quarantined her in a hospital container. My apartment room temp is 77°, so I'm hoping heater-less is okay for now. I'll keep a close eye. She is hardly moving; mainly floating, with the occasional twitch. I added some pellets, but she has no interest. She's lying motionless upside down at the surface.
I'm worried it's too late :'(
Thank you!

 

Sorry to hear that. Frogs are generally less delicate than fish, but once something takes hold they're more difficult to treat successfully. Meds are kind of a last resort and rarely work with them, to be honest, but it's hard to tell people that upfront because there's always a chance.

If you ever need to euthanize one: Benzocaine is recommended by study done on ACFs as the quickest and most humane approach for home aquarists to use by rubbing it on their chest area. It comes in a gel, creme, or a spray can.

 

Thank you for the response

Sadly, I think I was too late in realizing there was an issue; it progressed kind of quickly. She passed shortly after quarantined. I did a tank clean, water change. Poor thing