Safe: Shut-off automation and safety locking mechanism prevents undesired water leaking, e.g. when removing the pre-filter moduleEasyClean pre-filter module: No need to remove the whole filter – the pre-filter module is simply taken out, rinsed out and reinsertedPractical: Vent button for effective water intake – for fast and easy start-up when installing and after cleaningOptimal filtration: Fine 45 ppi pre-filter foam for optimal mechanical filtration of coarse debris and longer service life of the biological mediaOn request: Includes integrated HeatUp adjustable heater for BioMaster Thermo – it can also be retrofittedWell-regulated: Flow control on the filter or via adapter setLarge filter volume: The combination of mechanical and highly-effective biological filtration through Hel-X ensures healthy and clear aquarium waterEconomical: Quiet operation and energy saving pump without disturbing noises