A biological medium includes 50-70 parts by weight of zeolite, 2-5 parts by weight of activated carbon, 5-10 parts by weight calcium silicate, 5-10 parts by weight calcium carbonate, andesite powder 3-5 parts by weight and Bacillus subtilis 1-5 parts by weight.一種生物性介質包含沸石佔50-70重量份、活性碳佔3-5重量份、矽酸鈣粉佔5-10重量份、碳酸鈣粉佔5-10重量份、麥飯石粉佔3-5重量份以及枯草桿菌佔1-5重量份。10‧‧‧生物性介質11‧‧‧細孔