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Abstract: 

Resently, biological products for concentrated shrimp culture  widely . However, the  information on the effectiveness of products shrimp  confuses farmers and management agencies. he selection of appropriate biological products which for shrimp water is necessary. This will help shrimp farmingsafety and hygiene. Therefore, a research on the selection of suitable biological products for water treatment from shrimp farming with three different kinds of commercial products including: Product A: Bacillus  subtilis 3 x 10¹⁰ CFU/g and dextrose sufficient  for 1 kg; Product B: Bacillus  subtilis 2 x 10¹⁰ CFU/g and dextrose sufficient  for 1 kg; Product C: The micronutrients provide micronutrients that help the shrimp to harden quickly, stabilize the algae and alkalinity in the water) gives result as follow: The content of NH₄⁺, PO₄^3-, NO₂^-, NO₃^-, BOD₅, COD in water decreased. The efficiency of treatment of environmental indicators was over 63.0%. The highest result was 91.4% by COD. Product A: The treatment efficiency with environmental criteria is from 69.7 to 86.9%. After treatment, three out of four environmental criteria reached to acceptable limmit (GHCP), according to QCVN 02-19: 2014/ BNNPTNT. Producti B: The treatment efficiency with environmental criteria is from 72.7 to 91.4%. After treatment, all four environmental criteria reached to acceptable limmit (GHCP), according to QCVN 02-19: 2014/ BNNPTNT. Product C: The treatment efficiency with environmental criteria is from 63.6 to 91.2%. After treatment, two out of four environmental criteria reached to acceptable limmit (GHCP), according to QCVN 02-19: 2014/ BNNPTNT. In concludion: all three trialed products used for treatment of shrimp waste water showed good result, in which, Product B had the highest efficiency, wastewater after treatment is required in QCVN 02-19: 2014 / BNNPTNT.

Keywords: Probiotics, shrimp water treatment.