For a more accurate application, we recommend using a hand pump or backpack sprayer to apply Change Up because herbicides require a specific amount of product per area. Water is just the carrier so is not set and is however much it takes you to cover the area sufficiently. Please read the product label for complete application instructions.
The rates for Change Up Selective Herbicide will vary on a few different things. Where you are applying such as ornamental lawn & turf, sod farm or other non-crop areas. Lastly it will also depend on what type of lawn you are applying to. Without that information we would not be able to assist further with rates