Oase BioMaster Thermo 350Integrated heater Provides precise and uniform temperature levels and reduces the amount of equipment seen inside the aquarium by housing the heater in the unit EasyClean pre filter module Module can be removed separately from the rest of the filter. This reduces maintenance, increases filter efficiency, and extends the life of main filter foams. Customize the pre filter with coarse 30 ppi, fine 45 ppi, ultra fine 60 ppi, and activated carbon 45 ppi