Jandy JEF-IN Commercial Inline Erosion Feeder. Get safe, controlled chlorine delivery that’s even throughout your pool with the Jandy Erosion Feeder. Unlike floating, plastic dispensers which can deteriorate over time and lead to concentrated areas of heavier chlorine, the Erosion Feeder provides consistent sanitization. Designed to automatically dissolve chlorine tablets at the pool pad — so water is treated as it passes through the feeder before flowing back out to your pool — you can easily regulate the amount of chlorine or as needed using a simple ball valve control.