The aeration of method fluids use the identical "bubblers" as used in aquariums. Aquaculture requires aeration of ponds to enlarge the density of fish, shrimp and vegetation in industrial meals production. Aeration structures are used in each municipal and industrial wastewater remedy to eliminate VOC's and organics by using offering the "BOD" (biochemical oxygen demand) crucial to oxidize these compounds. In some functions with decrease mattress depths, followers can be used to aerate the ponds. In different functions the place odors are a problem, followers are used with exhaust hoods to manipulate the foul air by using developing a vacuum at the emission and forcing it via an smell manipulate machine or incinerator.