The bucket comes with a small scoop. Use 1 scoop per load, which is about 1 tbsp. Depending on your water quality, you may have to make minor adjustments. For lightly soiled or small loads, start with 3/4 tbsp. Use Charlie's pre-treatment for stains or soiled garments that are likely to need a little boost. Charlie's hard water treatment is recommended if you have hard water. Fabric softener is generally not needed when using Charlie's Soap.