The Wall Whale Swimming Pool Brush is a pool brush with a spoiler. The spoiler, or tail, holds the brush against the pool surface with more than 10x the force of a normal brush. Brushing a swimming pool is the most important part of swimming pool maintenance. Brushing your pool removes algae, but more importantly, brushing prevents algae in your pool and extends the life of your pool surface by removing mineral deposits which will ruin your pool surface. If you have a new swimming pool, it must be brushed 2-3 times per day for the first month. The Wall Whale is endorsed by swimming pool builders and swimming pool finish manufacturers as the most effective brush for startup pool brushing.