By chutkrong made from a mesh bag. With valve open-close the air ducts and pipes are there to see the level of biological fermentation of juice, water and bio-fermentation when external applications.
To do this, set the filter bag is made of mesh. Valve open - closed A vent pipe The level of the water pipes on the outside biological EM applications.
by filter inside of bag is a mesh, a valve opens and closes a vent And pipe class of biologically fermented outside the fermentation and biological applications.