Hello Relly,
So sorry you may very well have sick frog
When you get a moment read over some of the recent posts in this tree frog section regarding a run on ill whites. Sadly they have been quite sick. So in light of this ..............I would recommend not wasting any time. Get him to a herp. vet. The members who have posted recently have worked tirelessly in efforts to save their frogs. There have been many.

You could email Dr Frye if you do not have a herp vet. Dr Frye's contact info below:
All care is provided via email - medication are mailed to you.
http://www.frogforum.net/tree-frogs/...-prepared.html

In the meantime ( not in place of the vet) you could give him a pedialyte soak...directions in link below:
Try to weigh him ( a weight in grams is needed if your have Dr Frye treat him )

http://www.frogforum.net/tree-frogs/...-supplies.html

Additional care sheets and review of calcium / vitamin supplements:

Be sure to review all requirements for the right temps. and humidity --- some basics :

http://www.frogforum.net/tree-frogs/...caresheet.html

How to Create the Ideal White's Tree Frog Habitat

How to Care for a Whites Tree Frog (with Pictures) - wikiHow

calcium and vitamins
2 brands ------ 3 products: (alternate their use):

1.)
EntirelyPets Discount Pet meds Pet Supplies & Flea Medicine | Entirely Pets

2)
HERPTIVITE Multivitamin for reptiles and amphibians (3.2 oz)

Rep -cal .........company site:
Rep-Cal Supplements

3)
Repashy -superfoods - calcium plus
( this is a combo calcium and vitamis=ns)
Repashy Superfoods :: RETAIL SALES :: By Product Name :: Calcium Plus :: Calcium Plus 4 oz BAG - Repashy Ventures - Distributor Center

Keep us posted
Lynn