The heater is a compact, flat-profile unit built for small desktop aquariums housing tropical fish. It operates fully submerged in glass or acrylic tanks and attaches to the tank floor or side wall using the included suction cups, allowing either vertical or horizontal placement. The shatterproof housing is designed to withstand incidental bumps inside a tank. Wattage output is matched to specific tank capacities, so choosing the correct size for the aquarium volume helps maintain a steady water temperature. Installation requires no tools beyond positioning and securing the suction cups before submerging the unit. The heater should remain fully underwater whenever it is plugged in, and it should never be operated or left connected to power outside of water.