First off - thank you Ebony for your kind words.

We have not gotten the cultures back yet, but today we finally saw some real improvement! His belly looks white again, and tonight when I was giving him his dose of antibiotics, he went after a cricket (unsuccessfully though; the cricket jumped under the sitting pond).

BUT, that's the first time we've seen any hunting behavior from him in over two weeks! It really really gives me hope that we can get him through this waiting period until we definitively know (from the cultures), what is going on. I just hope it's a sign that whatever has made him so ill isn't kidney or liver failure. I would think if it was, we wouldn't see any improvement at all!

So, I'm keeping my fingers crossed. Tonight he was wide-eyed and happily sitting in his pond, constantly turning around to keep a good eye on the baby crickets in his tank. : )