The Waterline Cleaner is a special cleaning agent designed to remove the dirty edge that pool water leaves on the pool liner or tile wall. This edge can be caused by residues of sunscreen, limescale, and other organic debris, which causes a dark discoloration. With the Waterline Cleaner, you can easily remove this dirty edge, making your pool look clean and fresh again. This cleaner is safe to use, even when the pool is full and in use. The handy gel easily adheres to the vertical pool edge, making cleaning a simple task. Product Specifications: - Special cleaning agent for removing dirty edges in the pool - Removes residues of sunscreen, limescale, and other organic debris - Prevents dark discoloration on the pool liner or tile wall - Safe to use when the pool is full and in use - Handy gel that easily adheres to the vertical pool edge - Easy to use for a clean and fresh pool