This submersible SUNSUN GRECH CTP 20000 Aquarium Pump is ideal for use in a wide variety of water features, including fish tanks, garden ponds, waterfalls in aquariums, fountains, and filtration systems. The use of variable frequency technology allows for a novel and generous design, as well as low power consumption, high flow rates, low noise levels, and the ability to operate in both fresh and salt water. There is no rust or wear on the ceramic shaft, and it lasts a long time in use. They work with both fresh and saltwater and are copper-free. It’s simple to disassemble and clean this product without any additional tools.