Things You'll Need
Since standing water is always present in your toilet tank, the water can sometimes form an odor. Whether you have a musty smell from mildew growth, a sulfur smell from a hard water issue, or any similar type of odor, there are a few things you can pour into the toilet tank to eliminate these odors and keep the tank smelling fresh. These items are inexpensive, easy to find, and probably already in your home.
Pour 1/2 cup of baking soda into your toilet tank. The baking soda is a nonabrasive, natural deodorizer that will absorb and eliminate odors and keep your tank smelling fresh.
Drizzle 1/2 cup of white vinegar into the toilet bowl. This is a natural deodorizer with a disinfectant quality that kills mildew and dissolves hard water buildup.
Pour 1/2 cup of lemon juice into the tank if you want a citrus-fresh scent. Lemon juice is another naturally acidic deodorizer that can be used in the toilet tank without causing harm.