Multifunction internal aquarium filter with optional surface skimmer for enhanced water quality. Features three-stage filtration, adjustable flow control, and a fully rotating telescopic water outlet for flexible positioning. The built-in aeration system includes a silencer and adjustable airflow, while the motor is protected against overheating by an electronic safety chip. Designed for high filtration performance with low energy consumption, it also includes a surface skimmer to remove proteins, oils, and surface film for clearer, healthier water.