It is called Kent Marine Garlic Xtreme, I just picked some up at Alamo Aquatics in SA, I'm sure a LFS in Austin will have some?

Lots of theroies on Garlic! Does it actually assist in the fishs health somehow, or does it just encourage better eating habits which in turn improves health?

Bottom line, it don't matter - either way it promotes healthier fish. Ich can be a big problem with Tangs, but Tangs don't "catch" Ick. Ick is a parasite that is ALWAYS present in ALL saltwater systems. When a fish is stressed, malnourished, or in poor water conditions, its natural ability to fight off the parisite is weakened and the ick "breakout" can happen in a matter of hours. Healthy, well fed fish, in a high quality environment DON'T GET ICK!

The Tang Heaven should also be a great food source to get your little buddies eating like pigs.

Good luck - I hope your jumping days are behind you!