What is a primary reason roller pumps are not commonly used in aquatic weed treatment?

Roller pumps are indeed not typically used in aquatic weed treatment primarily because they do not produce the high pressures needed for effective spraying. In aquatic environments, where thorough coverage of large areas is required, the ability to maintain adequate pressure is crucial to ensure that herbicides effectively reach and penetrate the target weeds. High pressure allows for greater distance and precision in spraying, which is essential in managing aquatic plants.

While roller pumps have their advantages in certain applications, such as handling thicker fluids or providing consistent flow at lower pressures, their limitation in generating the necessary pressure for effective herbicide application in aquatic settings makes them less suitable. Thus, those seeking to control aquatic weeds require equipment that can deliver both volume and pressure, making roller pumps less favored in this context.