High quality Sturdy and durable Excellent workmanship, good aeration effect Widely used in: 1 fish ponds (aquaculture plants) increase oxygen for eutrophic water body in environment and biological culture. 2 increase oxygen for live fish and seafood transport, increase the amount of oxygen dissolved, prolong their lifetime 3 aquarium (purifiers) purification and filtration; water quality ozone sterilization and oxygen increasing. 4 sewage treatment plant for aeration and agitation, to prevent deposition of large particles of sediments and remove part of organic matters