Bloodworms have lots of protein, much more than adult brine shrimp.
Where did you read that?
I wonder if this is the "Yahoo group" in which you're getting your info (frog expert?)
Do they constantly call them DAFs?
I just don't agree that adult brine shrimp is a very good food as a staple.
You have to make up your own mind here though,
and do what you think is best for your frogs.
Here's an article on another site about bloodworms, and why there are so awesome.
http://www.raingarden.us/bloodworms.htm

You don't have to nuke the tank, fungus will always grow on dead skin,
and this is most likely just a bad shed, that the skin sticks to the body, then grows fungus.

I