Thanks for all of your sympathy. I ditched everything and used the 10% bleach method to clean the terrarium, then rinsed the bejesus out of it. There is one piece of wood that I am planning on saving, but I'm going use it for a future build and only after I have used every available method to sterilize it. I built up a new terrarium for the healthy frog, he is not showing any symptoms to date, and he is eating and pooping normally so hopefully he is in the clear! I omitted the moss, and added some Indian almond leaves that I had left over from my newest addition (Santa Isabel tadpoles). I was religious about spot cleaning and water changing before but now I will be a nazi about it.

I have also considered feeding in a separate enclosure, so that there are not any dead crickets laying around and hopefully the frog will do its business while still in the feeding tank to cut down on waste in the terrarium. Any opinions on that?