Practical Accessory---Designed for 20-30cm fish tanks, our skimmer is a reliable and practical accessory for any aquarium enthusiast.Our practical fish accessory is designed with standard workmanship and a fine structure, making it reliable and easy to operate. Boosts Water Quality---Our product increases dissolved oxygen in water, providing a fresh and healthy environment for your fish. It's perfect for filtering marine water quality (not for fresh water). Reducing The Burden---Our product separates organic matter before it decomposes into waste, reducing the burden on your aquarium's biochemical system. By increasing dissolved oxygen in the water, our skimmer promotes healthier fish and a cleaner, more vibrant aquarium. Premium Acrylic---Our practical fish accessory is designed with standard workmanship and a fine structure, making it reliable and easy to operate. Made of high-quality acrylic material, our skimmer is durable, clear, and strong, providing a clear view of your fish and . Our nano protein skimmer separates organic matter before it decomposes into waste, reducing the burden on your aquarium's biochemical system.