Atlantic's innovative diffuser design maximizes circulation and oxygen transfer by moving more water with less energy. The secret is in the innovative diffuser tubing, an extruded EPDM compound that offers tremendous longevity and resistance to fouling. Bubble sizes that decrease as pressure rises maximize surface area for extremely efficient gas diffusion. Sizing your aeration project is easier than ever before, with diffusers to accommodate every depth and profile. Easy to fill with any onsite sand or gravel, diffusers ship empty to save weight and freight.