Algae in pool

Your pool walls look like a science experiment because they’re a breeding ground for Algae in pool, calcium scale, and biofilm. Green, black, or mustard algae cling to surfaces, while hard water leaves chalky mineral deposits. Biofilm—a slimy mix of sunscreen, oils, and bacteria—makes chlorine ineffective, leaving walls greasy even in “balanced” water. Common trouble spots include corners, steps, and shallow areas with poor circulation. To combat this, use a pool wall cleaner regularly—manual brushing disrupts algae growth, while robotic or suction-side the pool cleaner models handle larger areas. Avoid myths like over-shocking or using bleach, which can worsen problems. For stubborn stains, identify the cause (iron, copper, or organic debris) and treat accordingly. Prevention is key: run your Pool wall cleaner 3-4 times weekly, maintain proper pH, and shock monthly. Whether you choose a robot for convenience or a manual scrub for precision, consistency keeps your pool from turning into a petri dish.