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The BioMaster Thermo line of premium external filters with integrated heaters are perfect for marine and freshwater aquariums. The BioMaster Thermo 350 boasts 4-stage filtration in a compact design. With the heater integrated into your filter, there is more room for undisrupted beauty in your aquarium. Biological, mechanical, chemical, and prefiltration all work together to provide your aquarium with optimal water quality and clarity. The BioMaster filters are designed with sealed filtration pathways to ensure water flow is getting the full benefits of prefiltration, filter media for clearer water, Hel-X Biomedia provide a large suspended settlement surface for microorganisms, and activated carbon for ideal nutrient reduction and removal of toxins. The EasyClean prefilter module can be removed and cleaned separately from the rest of the filter for high efficiency and to extend the life of your filter. The water flow can easily be adjusted on both the inlet and outlet adapters for the filter. Created for convenient placement under the aquarium. Add the included diffuser for uniform surface movement and provides additional dissolved oxygen to the water for ideal water quality. Features a carrying handle for simple moving and maintenance. This energy-efficient design includes a self-priming function for easy operation on startup and after cleaning. Includes a shut-off automation with built-in check valve to prevent leakage when cleaning the filter. This quiet operating filter is supported by an included 3 year warranty with a free 1 year warranty extension with online product registration. Customize your prefilter by combining coarse, fine, ultra fine, and activated carbon filter foams.