Powerful filters for 400 liter aquariums. Innovative design. Easy to use. Versatile. High quality. Tidal electric filters are designed from the ground up to provide your aquarium with complete, high-quality filtration. They are easy to use and adaptable. With a multitude of features, including a self-priming pump, dual intake with surface skimmer, adjustable flow rate, maintenance indicator, self-cleaning rotor, and a filter basket that holds any type of filter media - and more - tidal filters are designed to provide the best possible water quality with maximum versatility and ease of use.