Ara, I agree with Jannika: I would lean towards it NOT being Chytrid, if you have not added any new frogs to the tank and since you've had this froggy for quite a while.
I had two ADFs for about two years and then had this develop. I hadn't added any new frogs or other occupants, for that matter, but I did put some play sand in their tank; I had had gravel in their tank since I first got them, but decided they would like a softer substrate. That's the only thing I could figure exposed them to this as the spores can be in dirt.
I hope your little froggies will be OK. ADFs are just adorable, so endearing and entertaining!
I had two ADFs for about two years and then had this develop. I hadn't added any new frogs or other occupants, for that matter, but I did put some play sand in their tank; I had had gravel in their tank since I first got them, but decided they would like a softer substrate. That's the only thing I could figure exposed them to this as the spores can be in dirt.
I hope your little froggies will be OK. ADFs are just adorable, so endearing and entertaining!