From the study of Avnimelech et al.(1994), it was found that the Nile tilapia (Oreochromis niloticus) density in the system BIOS each lock. The fish can feed protein in food available compared with fish raised in dense system normal 2 imaginable. Because of many kinds of microorganisms in Locke have both, yeast, mold.The other, which is the source of protein quality for aquatic animals. The shrimps in the system with floc growth rate than normal 15-35%
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