The Fluval SK400 Surface Skimmer is a compact, powered device that removes oily films, dust, and debris from your aquarium’s water surface, improving oxygenation and light penetration for healthier fish and plants. It features a self-adjusting floating intake, adjustable flow control, and a diffuser for varied water movement, fitting both rimmed and rimless tanks with its unique spacer design, and is suitable for aquariums up to 400 liters.  Removes Surface Film: Eliminates unsightly oily films caused by dust, food, skin oils, and smoke. Improves Water Quality: Enhances gas exchange for more dissolved oxygen and allows better light penetration for plants. Self-Adjusting Intake: The floating intake moves with water level changes from evaporation, ensuring continuous operation. Adjustable Flow & Direction: Control the skimming intensity with a slider and fine-tune output with a diffuser for gentle or multidirectional flow. Versatile Mounting: A backside spacer allows placement on both rimmed and rimless tanks. Compact & Quiet: Its small size minimizes disruption, while the design ensures quiet performance. Fine Filtration: Includes a fine filter sponge to capture small particles, with options to upgrade to filter floss for finer debris.