Efficient Cleaning: Simply drag the soft pad of the aquarium glass cleaner on the outside of the glass, while the rough pad on the inside cleans the inside. The square design of the magnetic aquarium brush makes cleaning small corners or hard-to-reach areas easy and convenient. Please note that this product is only suitable for cleaning glass that is 0.5 cm thick or less. Double-Sided Cleaning: One side of this aquarium glass cleaner uses a thick, scraper-grade material to effectively remove stubborn stains or mineral deposits from the inside of the glass; the other side is a felt pad for wiping away dust from the outside. This combination of double-sided cleaning thoroughly cleans the aquarium, leaving it crystal clear. Easy Storage: This compact aquarium scrubber (5.6 x 3.5 x 4.2 cm, L x W x H) is easy to store and carry. It can be placed directly in the corner of the aquarium glass without blocking, making cleaning very convenient. Applications: With these magnetic aquarium cleaning accessories, you can clean the bottom of various types of aquariums. Magnetic glass cleaners can also be used to clean various windows, glass doors, and other glass surfaces with a thickness of less than 0.5 cm, making them very practical.