The Fluval FX4 aquarium canister filter is a high-output external filter built for large fish tanks up to 1,000 litres (roughly 6 feet and above), moving around 2,650 litres per hour through a huge multi-stage media chamber. Part of Fluval's legendary FX “workhorse” series, the FX4 delivers serious power and a massive media capacity, making it ideal for big planted displays, monster-fish tanks, cichlid setups, goldfish and turtle tanks, one of the most powerful canister filters available in India.