How to Clean Waterline on Fiberglass Pool (Without Damaging It)

A crisp, gleaming waterline is the signature look of any well-kept fiberglass pool. Yet suntan oil, pollen, dust, and evaporated minerals collect right where water meets air, leaving a dingy “bathtub ring” that spoils the view. A fiberglass gel-coat is inherently slick and non-porous, so the cleaning process is quick—if you use the right tools […]