This research was conducted on March 2019 until April 2019 held at UPT Fish Hatchery and Experimental Pond Fisheries and Marine Faculty Riau University. The aim of the research is to know the best stocking density on Asian redtail catfish (Hemibagrus nemurus) with boster system. The design of this research is an experimental model using Completely Randomized Design Factorial pattern (RAL) of 1 …