The ALPHA SP 320 20L is a high-performance aquarium filter designed for small to medium-sized tanks, with a capacity of 20 liters (approximately 5.3 gallons). It features multi-stage filtration, including mechanical, biological, and chemical processes, ensuring efficient water cleaning and a healthy environment for aquatic life. This filter is easy to maintain and provides reliable performance, making it an ideal choice for hobbyists with smaller aquariums seeking crystal-clear water and effective debris removal.