Keep your glass aquarium clean and algae-free with API Algae Pad for Glass Aquariums. These sturdy, long-lasting pads can be used to quickly scrub algae from the nooks and crannies of your aquarium. Manually removing algae, along with using an algaecide, is key in treating and controlling algae growth. Made specifically for glass aquariums, it is non-abrasive and will clean thoroughly without scratching or damaging your tank's delicate surface. And its large size allows for maximum cleaning in spacious tanks.