Soak the label off a dishwashing or laundry soap bottle. Fill the bottle with water, put the cap back on and place it in the tank, making sure it doesn't interfere with the flushing mechanism.
Direct Marketing Association
Mail Preference Service
P.O. Box 9008
Farmingdale, NY 11735-9008
Experian (formerly TRW): 1-800-353-0809
Trans Union: 1-800-680-7293
Fill a shallow pan with beer, sinking it to ground level.
This is a guaranteed snail catcher.