Firstly, next time you post can you please try and make paragraphs - it's very daunting to read the one continuous piece like that.

As to the problem, a few alarm bells go off for me. Firstly, you shouldn't be using a UV light. Secondly, the temperature should not vary that much each day (20 degrees F is too great a variation and is stressful). Also, 85 is a bit too hot for these frogs in my opinion. Lastly, it sounds like the frog was severely underfed (and/or under eating) for its size. I hope these are some points you can work on. Sorry for your loss.