Thanks for the reply. I'm starting to think that maybe the tank was too warm.

Yesterday I took Pork out of the 20g and put him in the 29g, which at 68 degrees is about 10 degrees colder than the 20g. After awhile, he was singing quite a bit and both frogs began actively swimming around. My wife said they missed each other, so I felt bad about separating them. Not knowing whether or not the bloating was contagious, I decided to reunite them in the 29g. They sang like crazy all night long. This morning, the tank is full of eggs! Pork was clamped around Clem and they swam around and around like that for hours. They are taking a break I guess, but still singing. Pork looks a LOT better! The swelling in his body has subsided, so right now he's back down to where he looks like he's wearing Puff Daddy pants. Clem looks tired.

So I'm going to do a water change and then put some of the eggs in the 20g, see if they hatch. I did notice a couple white wriggly worms swimming in the 20g, which I have never seen before. (I've been keeping frogs for 3 years). Don't know if they are parasites or food, so I'm just going to do a pretty good cleaning.

Hopefully Pork is on the road to recovery. He certainly seems to be firing on all cylinders, that's for sure. All in all, it's pretty fascinating.