The research of Effect of Giving Bokashi Fertilizers with Different Ingredients on the Growth of Tubifex sp. With a multilevel recirculation system has been implemented in 38 Kamboja street, Simpang Baru, Panam Pekanbaru, Riau from October 2017 until Jauary 2018. The method used is an experimental method with four treatments consisting of bokashi fertilizer from chicken manure, bokashi fertil…