NanoMag
The NanoMag is an itsy-bitsy, lean, high energy, window cleaning apparatus. Its patented design provides flexibility and a sledner profile that slips safely between polyps or plants and viewing windows. It´s got the umph needed for cleaning glass up to 13mm (1/2") thick.
The NanoMag also glides across the curved surfaces of fish bowls, wiping off algal films with ease, and it´s so much fun to use you just might have to take turns.