A filtration system is essential in an aquarium to maintain a clean and healthy environment for aquatic life. It helps remove physical debris, excess food, fish waste, and harmful chemicals like ammonia and nitrites, which can be toxic to fish. A good filtration system also promotes beneficial bacteria growth, which helps break down waste naturally, ensuring stable water parameters. Additionally, proper filtration improves water clarity and oxygenation, creating a more suitable habitat for fish, plants, and other aquatic organisms. Without filtration, the water can quickly become polluted, leading to poor health or even death of the aquarium inhabitants