Penn-Plax Cascade 400 Fully Submersible Internal Filter – Provides Physical, ...

Manufacturer ‏ : ‎ Penn Plax. This filter cycles water at 110 Gallons per Hour (GPH) for tanks up to 20 Gallons in size. - VENTURI AERATION: The Cascade 400 features Venturi Aeration, which provides your tank with filtered, oxygenated water.

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