Basically, you can get kent's extreme garlic or seachem garlic guard. it's like a garlic extract you pour in your water and it supposedly makes your fish crazy hungry. Never tested this myself, so i have no testimony. Either way, I'd recommend exactly what Bderick said. Leave it be for a few more days, at 12", that should be no problem at all. Just keep your lights off, keep your water clean, and eventually it will eat. Remember, no feeders.