Seachem Algae Pad

Seachem Seaweed Pads are anti-scratch seaweed pads for glass and acrylic. The melamine foam uses micro abrasive technology to easily remove algae from the walls of your aquarium. They are particularly effective in removing algae from scratches. They are chemically inert and do not use soaps or detergents. Their white color contrasts with the dark algae, making it easier to see when the areas are perfectly clean.

More on melamine:
Melamine foam is an incredibly effective abrasive cleaner. It has a microstructure as hard as glass, but due to its open cell structure it remains flexible. It works on stains much like extremely fine sandpaper. In the aquarium, it easily eliminates algae by scraping with its extremely hard microscopic filaments.