Biological film buildup on stone surfaces can lead to discoloration, deterioration, and unsightly stains. To prevent this, regular cleaning with mild detergents and soft brushes is essential. For tougher cases, antimicrobial treatments or specialized stone cleaners can inhibit microbial growth. Proper sealing of porous stones also reduces moisture retention, a key factor in biofilm formation. Additionally, maintaining good drainage and minimizing shade in outdoor settings helps keep surfaces dry. Combining these methods ensures long-term protection and preserves the natural beauty of stone surfaces.