 "Tubifex" can be easily cultured on mass scale in containers with 50- to 75-mm thick pond mud at the bottom, blended with decaying vegetable matter and masses of bran and bread.Continuous, mild water flow is to be maintained in the container, with a suitable drainage system.After the arrangement of the system, the container is inoculated with "Tubifex" worms which can be obtained from nearby muddy canals or sewage canals.