<p>Algae Remover Aquarium Cleaning Pad Safely Removes Algae and Hard Water Deposits,"Made of nontoxic, recycled material, this nonabrasive pad safely cleans any aquarium surface including glass, acrylic, plexiglas or plastic. Removes algae, water lines, salt residue and hard water deposits and is handy for cleaning plastic plants, ornamen","Before each use, wet the pad, then gently rub surfaces to be cleaned. Rinse pad with tap water after each use. Avoid getting sand or gravel on the pad as these will cause scratches to surfaces. Avoid extreme pressure as this may cause surface scratches o","pad with handle (18)"""</p>