provided plenty of probiotics for shrimp that are already commercialized. criteria for selecting probiotic is best 1) strain of probiotic bacteria must come from healthy shrimp or isolated from healthy shrimp, 2) has been through a series of tests (test power resistor, resistance tests thd antibiotics, growth rate, the ability of attachment, hydrophobicity and aggregation, pathogenicity test , etc.), 3) multi-location test

The use of probiotics in shrimp aquaculture.

Farzanfar A1.

Abstract

Shrimp aquaculture, as well as other industries, constantly requires new techniques in order to increase production yield. Modern technologies and other sciences such as biotechnology and microbiology are important tools that could lead to a higher quality and greater quantity of products. Feeding and new practices in farming usually play an important role in aquaculture, and the addition of various additives to a balanced feed formula to achieve better growth is a common practice of many fish and shrimp feed manufacturers and farmers. Probiotics, as 'bio-friendly agents' such as lactic acid bacteria and Bacillus spp., can be introduced into the culture environment to control and compete with pathogenic bacteria as well as to promote the growth of the cultured organisms. In addition, probiotics are nonpathogenic and nontoxic microorganisms without undesirable side-effects when administered to aquatic organisms. These strains of bacteria have many other positive effects, which are described in this article.

http://www.ncbi.nlm.nih.gov/pubmed/17064272

thankx sir

A basic concept of microbiome work is that diversity provides greater benefits and stability. So while focusing on one species (strain) is good, it might be beneficial to also focus on additional probiotics to add to the effect of one. Also make sure that the 'one' is the best for the strain of shrimp you have and your culture conditions.