Things You'll Need
White vinegar
Toilet bowl brush

Mineral stains are a major problem with toilet bowls, developing mostly when you have a hard water supply that has a high mineral or alkaline content. This often leaves a dirty, discolored ring around your toilet bowl that sticks tightly plus leaves spots throughout the bottom of the toilet bowl. To remove this mineral buildup, you have to use a product that dissolves the mineral content without damaging your toilet or plumbing system.
Step 1
Pour 2 cups white vinegar into your toilet bowl. Let sit for 15 minutes.
Step 2
Scrub the toilet bowl with your bowl brush and examine to make sure all stains are removed. Flush the toilet.
Step 3
Pour 1 gallon white vinegar into the toilet bowl if mineral stains are still present, and this time let the vinegar sit in the toilet overnight.
Step 4
Scrub down your toilet bowl the next morning with the bowl brush and flush the toilet when all stains are gone.
Step 5
Repeat the 2 cups of vinegar step each week to keep the stains at a minimum.