Help with a possible sick whites tree frog

[Cyrus]

Hi guys

I have read alot of posts on this forum about whites tree frogs turning brown, some say stress some say its normal. I have noticed that a few days ago one of my whites has taken to going brown in the day and almost back to green at night.

He also isn't very active unlike the other one i have. He just sits in a cave at the back of the tank.

He only seems to have gone brown on top and still abit green around the edges. His belly is white but has a slight yellow tint to it.

He is eating but ony two or three small locusts at a time (per day) and maybe the odd wax worm. Most evening he starts barking.

Tank info:
Exoterra 45cm x 60 cm tank and hood with 2 x 13 watt reptiglow 2 bulbs on 7am to 9pm
2 adult whites tree frogs
Bark shavings as a substrate
Temps around 70 - 74
Humidity 65-85
Plastic and a few real plants (told by pet shop are frog friendly)

I think this is the correct set up so i can't understand whats happening.
Ok since posting this i turned there light off. just gone back to the tank and he is out sitting at the highest level, and he is almost green again.

I have just feed him and he took 4 more locusts and another wax worm.

Here are a few pics of my two whites. He is some times abit darker brown than this. Will try get some more pics.