If you’re looking at new fish food, salt, or aquarium additives for your aquarium but don’t want to waste money on a product that you might end up hating, ask your favorite retailer for a free sample. While the store may not readily have a free sample on hand, they can always request one from the manufacturer or distributor. Companies send out free samples all of the time, especially to fish stores they wish to do business with. So don’t be afraid to ask. What’s the worst that could happen? Maybe they say no or give you the run around.