Whites Tree Frog - Looking very poorly

[Sunshine]

The image uploader is not working but if you have a photobucket, flickr, instagram etc. account you can upload from there. That is what I have been doing. A picture would be very helpful.
I am not an expert so someone correct me if I am wrong but here are a few things I noticed:

Lighting- I would increase lighting to 12+ hours per day

Water- If you are going to use tap water it should be treated with a water conditioner (Prime, Reptisafe, API Stress Coat, Tetra Aquasafe etc.)

Substrate- I would get rid of the bark and put moist paper towels down for now so you will be able to see the poo. The bark poses an impaction risk if he were to accidentally ingest a piece. When he gets better you can switch to a coco fiber substrate. (Eco Earth, Plantation Soil etc.)

You say you are dusting his food items now. May I ask what you are using?

I hope this helps and if I forgot anything someone let me know.