Yes, chlorine and other harsh chemicals used in swimming pools can negatively affect the color or finish of decorative water feature pieces, especially those made from GFRC or fiberglass resin composite. These materials are designed for use in freshwater environments without exposure to harsh chemicals, as prolonged contact can cause fading, discoloration, or deterioration of the finish. For optimal performance and longevity, these features should only be installed in freshwater systems without harsh chemical additives.