HELP!!! Tree frog, not eating or pooping and I think he may have thrown up?

[Crispy42]

I would take the pet store employee's advice with a grain of salt (or maybe a ten pound block of salt!). Unfortunately working at a pet store doesn't guarantee that he knows what he's doing. Most pet store employees have very little education about exotic animals. I haven't heard of frogs throwing up (it seems much more likely that it was an unusual bowel movement, eggs, and/or shed residue), so I'm a little uncertain of the pet store employee's explanation.

How often were you cleaning the tank and changing his water before this recent cleaning?

What kind of filter are you using for the tap water? Knowing the brand and/or model can help us look up if it is making your water frog safe, but I would still strongly recommend getting dechlorinator. You can get a bottle for just a couple do,Lars and it lasts a long time. Even if your filter is removing chlorine, is it removing chloramine?

I would also recommend either bringing him to an experienced frog vet or getting a fecal test for parasites. Fecal tests generally run about $20 or less in my experience and you don't even have to bring the frog into the clinic, just a recent stool sample.

Lastly, for his long term care are you planning to upgrade his tank size? 10 gallons works for a quarantine tank for a new juvenile, but an adult whites tree frog will need a larger tank in order to be happy and avoid health problems.