Sick White-lipped Tree Frog?

[ISW Avalon]

One of my two white-lipped tree frogs has developed some terrible discolored splotches on all over his body. http://img683.imageshack.us/img683/7910/dsc01720hl.jpg
The marks were very subtle at first, and I thought it was just some minor bruising. But it has gotten much worst in the last few weeks.
The only recent changes are a potted bamboo plant in his tank, and I switched to a different vitamin spray (but I began using the different spray almost 2 months ago, and he only developed these spots a few weeks ago, not to mention my other white-lipped tree frog he lives with is completely healthy and free of spots.)

He still has a hearty appetite and is as active as white-lips aught to be, but I'm worried about him.
Any insight would be truly appreciated.

Thanks,
Sara

[Kisa]

Looking at these pictures my first thought was Chytrid Fungus. I am no expert though, so I have no real authority on this matter it's just a guess. Has he shed in the past couple days, or even weeks?

I would remove him from your community immediately and place him in quarantine to keep your other frogs from catching whatever he has. Make sure you keep their water bowl very clean, and if you don't keep a planted viv (or if you do and want to be extra cautious) I suggest an overall cleaning of the viv, replacing anything and everything that your frog climbed on or slept on, and cleaning the walls of the viv with a reptile safe cleaner. These are just suggestions though, I think it would be better if someone with more information about your frogs illness answers you first before you do anything drastic. But definitely remove the sick one from the rest and place him in a sterile environment.

Also posting your tank size, humidity, and how often and what you feed the frogs can help with diagnosis. But I would definitely try to find a herp vet in your area, just in case,

[Leefrogs]

Are you spraying the frogs with that spray? I thaught that sprays should be added to the water. I don't use it because I dust my food items, and feed crickets good food. Ya it looks bad, as far as Kisa saying chytrid, it does look like it, but frogs are deseased when the skin looks that bad. At that stage they are soaking and lethargic, with the legs being held away from the body. And its also a very fast killer. That's why I'm thinking it's the spray. the might be the first one in the water and getting more of a dose compared to the other frog.

So, just follow what Kisa said and soak the frog in spring water, if in 2 days he looks better than you know it was the spray. But a vet is nessisary if his color doesn't improve in that 48hrs. In his new enclosure he's going to be very stressed, a drop of honey per ounce of water will help him relax.

Good luck, keep us posted.