The OASE CrystalSkim 350 removes biofilm, floating plant matter, and dust from the water surface to improve oxygen exchange and maintain crystal-clear water in your aquarium. A built-in bottom outlet improves circulation in low-flow areas, while the removable, collection basket protects small fish and shrimp. Designed for freshwater and saltwater tanks up to 92 gallons (350 L), the surface skimmer features an adjustable flow rate and a floating intake ring for consistent performance, even in uneven setups. Compact, quiet, and easy to install with suction cups, CrystalSkim is German-engineered, Italian-made, UL-certified, and backed by a 3-year warranty.