PERFORMANCE – Max. Flow 225GPH (850L/H), Max lift 4ft (1.2m), Power 8.2W. For tank size of 40-70 gallons.REMINDER: Choose the right filter for your tank. A filter can’t cover tanks of big differences in capacity (as claimed by some products online)! Follow our recommendations for your tank..SAFETY – The pump is fully submersible with epoxy sealed motor. Each product has been submerged in water and tested with super high voltage to ensure the safety..3-STAGE FILTRATION – 3 sponge blocks – coarse sponge, carbonized sponge and fine sponge provide 3-stage filtration. COARSE SPONGE filters out large size impurities such as food residue, fish excrements, plant leaves etc.; CARBONIZED SPONGE removes odor, chlorine and fine particles; FINE SPONGE polishes water before it goes back to tank. PLUS the transparent box makes it easy to observe the filtering material when they get dirty. Search code "B09KXZXCQV" for the replacement sponges.AERATING WATER - Oxygenation is very important to your fish. Different from most of the filters in the market, this turtle tank filter also provides an air venturi and air tubing to increase oxygen supply in your fish tank. DOUBLE WATER OUTLET - This filter is innovatively designed with dual water outlets to ensure more even water distribution in your fish tank!.KIND REMINDER – If your tank is very large, choose 2 filters! Place a filter at both the left and right corners at the back side. You will get full filtration and great water circulation in your tank!