Aries Chlorine, Taste & Odor with Scale Prevention cartridges are designed to improve drinking water aesthetics while simultaneously mitigating scale buildup. Premium granular activated carbon works to dramatically improve the taste and odor of drinking water by reducing chlorine, while Slow Melt Phosphate works to soften water, control scale and corrosion, and sequester iron, calcium and manganese. Sized to fit standard Slim and BB housings.