Keep your aquatic environment clean and healthy with the AQQA 3-in-1 Internal Aquarium Filter. This versatile filter provides essential oxygenation, water circulation, and powerful multi-layer filtration, ensuring your fish thrive in crystal-clear water.Information about 3-in-1 Internal Aquarium Filter DetailsVersatile 3-in-1 FunctionalityThe fish tank filter features both rainwater and aerator modes. It offers oxygen supply, wave-making, and water circulation functions. This ensures a well-oxygenated and clean environment for your aquatic life. Suitable for tanks up to 30 Gallons (8W, 78GPH).Efficient Multi-Layer FiltrationWater enters from the bottom or side for thorough purification. It is filtered by high-density filter cotton, hollow quartz spheres, and bio-chemical filter cotton. This aquarium filter purifies the water effectively. It enhances its quality to ensure the fish tank remains clean and healthy.Easy to Use & Adaptable DesignDesigned with a flexible DIY structure, you can choose how many filter boxes to use based on your fish tank’s size. This submersible aquarium filter operates efficiently with bottom suction or side suction by a switch button, even when the water level is low.Ultra-Silent OperationThe working noise of the filter is ≤ 35dB. This ultra-silent fish tank filter pump comes with an adjustable airflow knob. You can flexibly adjust the air output. This keeps water flowing gently and evenly without harming delicate fish and shrimp. Multi-layer Effective Filtration Package Included Note:Your purchase includes 1 Filter unit, 1 Suction Cup Holder, 1 Oxygen Spray Outlet Pipe, 1 Rain Shower Outlet Pipe, and 1 Flat Spray Nozzle. Filter material included: 1 Fluidized Bed, 1 Filter Quartz Spheres, and 1 Bio-chemical Filter Cotton.