Flexzion Aquarium Internal Filter 210 GPH 800L/H Submersible 3-in-1 Multi-Function Mini Pump for 50 Gallon Fish Tank with Adjustable Flow Rate + Spray Bar + Pipe Fits tank size up to 50 gallon Compact power filter with adjustable flow rate Integrated spray bar creates an even flow of water Direct flow diffuser for greater surface agitation Suitable for both freshwater, saltwater and pond use