The BioPlus Thermo line of premium internal corner filters reduces the amount of additional equipment seen in the aquarium by integrating the heater into the filter. Perfect for medium sized freshwater aquariums, this filter uses biological, mechanical, and chemical filtration for optimal water quality and clarity. The integrated diffuser with adjustable water flow nozzle allows for uniform surface movement, prevents formation of biofilm, and provides added aeration. For simple cleaning and maintenance the filter foams are housed in separate modules that can be removed while the pump unit and heater remain in place in the aquarium. No need to remove the entire unit during maintenance routine.