Is clr safe for fiberglass tubs?

CLR (Calcium, Lime, and Rust remover) is generally not recommended for fiberglass tubs, as its acidic formulation can damage the surface and lead to dullness or discoloration. Instead, it's advisable to use cleaners specifically designed for fiberglass surfaces, which are gentler yet effective in removing stains and buildup. Always check the manufacturer's guidelines for your tub before using any cleaning products.