Lactobacillus plantarum, Lactobacillus is a lactic acid bacteria, the optimum growth temperature is 30 to 35, anaerobic or facultative anaerobic bacteria is straight or curved rod, single, sometimes in pairs or in a chain, the optimum around pH 6. 5, belong to the same type of fermented lactic acid bacteria. This difference in lactic acid bacteria and other bacteria in the viable cell count in this relatively high, large numbers of acid production, stabilize PH value of water does not rise, and its output an acidic substance capable of degrading heavy metal; pressure of oxygen is due to the bacteria bacteria (facultative aerobic) during the breeding process can produce unique Lactobacillus prime, prime Lactobacillus is a biological preservative. Late in the breeding, animal dung and residues due to the increase of food, will sink to the bottom of the pond, and decay, breed a lot of bacteria to produce large amounts of ammonia and nitrite, the bottom stealing dead serious. If long-term use of Lactobacillus can inhibit good bottom feces and rotting food residue, it reduces the increase in ammonia and nitrite, a significant reduction in the amount of chemical degradation factors that reduce the cost of farming.