If your customers are getting rust stains on their property from their irrigation systems, it could be caused by trace amounts of iron in the water. They could also have rust building up within the system itself. We recommend making Rid O’ Rust Rust Preventer part of the system, with the aid of the GreenFeeder System for administering the products. We have an online calculator to help you determine the amount of iron in their water and how much Rid O’ Rust Rust Preventer is necessary.