My frog has been weak all day and now his legs have straightened and he seems to be hyperventilating, I have saw a frog die this way before, I have no idea of the cause! or whether something can be done to save it!

He live in a tall exo terra viv with coconut/moss substrate, there are false plants on both sides of the glass, a large deep water dish with treated water, daily temp ranges 25/26 of a day, to 22/23 of a night. He gets a variety of live gut loaded foods. I clean the viv with reptisafe weekly the decor is boiled clean.