i purchased my frog almost 2 weeks ago, he is about 2.5 inches from end to end. a BEAUTIFUL bright neon green color.
i have him set up in a 5 gallon, with an undertank heat pad and the substrate is shredded coconut husk. i keep it quite damp in there.
his tank is kept in my bathroom. (warmest room in the house0

so heres the questions: firstly, he hasnt eaten that i can see yet. i have tried 2 pinkies, and earthworms. he MIGHT have eaten a worm or two, but it looks doubtful.
last week he had his eyes closed for acouple of days and his color changed to a yellowish green. after a while, i decided to try and move him. he did not respond at all. the pet store recommended that i pour some lukewarm water over him, which i did and it seemed to reinvigorate him. he started moving around and looks much better now, however his color is still a very light yellowish compared to the vibrant neon green.

any thoughts as to what is wrong with him?