Pack of 6 Garlic Scent Pucks
Single Tube - 6 Garlic Scented Pucks
The nerdy explanation:
The reason garlic works so well is that it is composed of aromatic amines, cyclic molecules that escape as scent very readily. That is why when you cook garlic or hot peppers, they release pungent scent so quickly upon cooking. When these aromatic compounds are put in fish scent, they distribute quickly in the water, much faster than regular prey food's scent.
Aromatic amines enter the fish's nostrils, and they trigger the brain to follow and feed if they like the scent, and scram if they don't, such as bear scent diverting running salmon. Since fish don't avoid garlic it can only result in positive behavior; ie. feed, reproduce or move.
The fisherman explanation: