2027 Pool & Spa Show

Fading Fiberglass: The Chemistry Behind Chalking and How to Stop It

Goal: To give pool pros a practical, easy understanding of why fiberglass pools chalk and fade, and exactly how to adjust water chemistry to protect the gelcoat. Description: Stop fighting the white haze on fiberglass pools. In this 60-minute session, we’ll cut through the old industry myths about gelcoat fading and calcium scaling. We'll start with the basics of how fiberglass shells are actually built and then describe how this affects the chemical reactions that cause that stubborn "chalking," and finish with practical, real-world water chemistry strategies service techs can use to prevent it from happening.