... , stainless steel fastener The Hanging Tube Aerator Also called as fine bubble diffuser,is composed of aeration membrane EPDM or Colicone ... be put under water without floating due to the steel rod/ concretes inside the manifold. The total unit is fasten by ... and get exuded by the areator, and bring out fine bubbles. the steel rod/ concretes inside the manifold, ensures stable running of ...