Two Little Fishies' NanoMag is an itsy-bitsy, lean, high-energy, window-cleaning apparatus. Its patent-pending design provides flexibility and a slender profile that slips safely between polyps and viewing windows. It’s got the umph needed for cleaning glass up to 3/8” thick. The NanoMag also glides across the curved surfaces of fish bowls, wiping off algal films with ease. The cleaning pad is a 1" X 1" square.