Jellyfish,
You could go get some of the expensive GarlicX stuff from a LFS if you wanted. However, it is much cheaper (and just as effective IMO) to go to the grocery store and get a small jar of minced garlic and use the juice. Whenever I put a few drops on my nori, the tank turns into a feeding frenzy. Even my lionfish looks at it longingly as if he really wants some.