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Probiotic: How to harness the power of beneficial microbes.

Updated: Jun 21

Probiotics act as a live microbial feed supplement which beneficially improves microbial balance of the host animals as well as the environment. Probiotic can benefit the animal through intestinal microbial processes. In the aquaculture process, the bacteria strains in the water or soil can be change by eliminating the bad bacteria and adding good bacteria inside the water. Adding probiotics to control the pathogen in the shrimp farming industry is very common practice nowadays. However, the effectiveness can only be confirmed by the timing, dosage, administration, species and strain.


This probiotic works by three factors which are immunomodulation, competitive exclusion and bioremediation. The first action is to enhance the immune function inside the shrimp, so it is important for the shrimp body system to fight against pathogens. Second, probiotics can modify and stabilize the species composition inside the water, especially when you have a bacterial infection. Bioremediation helps in the improvement of water quality in which probiotics control the concentration of total ammonium nitrogen (TAN), phosphorus or sulphide.


Generally in aquaculture, the probiotic will be applied through water or feed additives. When applied to water, the probiotics containing certain bacteria strains will multiply and outgrow the pathogens inside the system when dosed. If applied through feed, a binder such as egg or oil is needed to coat the probiotic on the feed. Continuous supply of probiotic inside the feed or schedule of two week of feed and then skip for one week is suggested for the feed additive method.


The floc consist of microbial community which acts as the probiotic where the probiotic perform competitive exclusion. The UV filter which is use in RAS is not applicable in biofloc because all bacteria whether they are good or bad are in the same community. Bacteria in biofloc can be either heterotrophic or autotrophic both helping in treating ammonia. In RAS, probiotics can be used in two ways which are either included in the feed or to seed your K1 media so that the bacteria will grow fast. The k1 media is used to remove ammonia so the bacteria attached to this k1 is also categorized as probiotic.


Here in RAS Aquaculture, the biofloc system culturing the shrimp consists of bacteria which are either heterotrophic or autotrophic both helps to treat ammonia in the system