I. Introduction
Demand for fish and the fish processed food is increasing, while the condition of fisheries is currently in stagnation condition, and even tended to decrease production in several regions in Indonesia. Marine environmental degradation as a caused by global climate change, coupled with uncontrolled excessive exploitation decrease the production of marine fisheries [1]. Therefore, alternative suppliers of fishery products are from aquaculture. However, due to a limited area and climatic conditions are not always supported, these are becoming inhibiting the development of aquaculture in most countries in the world, including Indonesia [2]. Therefore, we need a technology that is used to increase the production of this aquaculture, for example by monitoring water quality for fish farming. As for the parameters of the water quality in this research are determined by Dissolved Oxygen (DO), temperature, and acidity (pH) of the water.