The effect of fish aquaculture on water quality in Lake Cilala, Bogor Regency

Fish aquaculture using floating net cages is a common way to utilize water body, which often caused water pollution. Lake Cilala is a lake with high trophic level in Bogor Regency, West Java, that used for fish farming activities. Historically, eutrophication events that have occurred at Lake Cilala made this research interesting to see the effect of fisheries activities on water quality. This research analyses pH, phosphate, nitrate, and BOD and their effect on water quality, with criterion is based on Indonesia Government Regulation No. 82 of 2001 (Class II). Water sampling is conducted using a grab sampling method at the lake and then tested in a laboratory. Analysis of the effect of the parameters tested on water quality was carried out by a literature study. Results indicate that water quality is in poor condition due to fish aquaculture activities. The concentration of nitrate and BOD were found to be 4,21 mg/L and 8,20 mg/L, which determined the pollution of Lake Cilala. Without any proper management, these pollutants can increase to a certain level, causing more troubles like eutrophication. The right strategy needed in managing fish aquaculture using floating net cages to maintain the water quality of Lake Cilala.