Product details:

Fluval External Filter for Aquariums, Size 406; Fluval External Filter for Aquariums delivers a host of benefits including better filtration, less maintenance frequency, faster setup, and quieter operation. Designed to make fish-keeping as easy and worry-free as possible. It features patented Aqua-Stop Valves for easy hose disconnections, single-motion lift-lock clamps for simple cleaning and maintenance, and multiple removable filtration baskets that come packed with the necessary media for mechanical, chemical and biological filtration. In addition, it has a unique square-shaped design that holds 35–50% more water than round canisters allowing better water flow that maximizes contact with the filtration media.