Contribution of Gracilaria verrucosa on water quality improvement at fishpond in Muara Gembong coastal waters, Bekasi Indonesia

Abstract

The waste present in the pond comes from inside (can be NH4, NO3, and PO4) and outside the pond (Pb). One of the ponds that experience this is a pond in the Muara Gembong coastal waters. To remediate these wastes can use algae Gracilaria verrucosain one cultivation cycle. The result obtained is a NH4of 0.89-22.5 ppm, NO3 of 3.05-93 ppm, and PO4of 0.01-0.52 ppm. The t-test result, in general, is x > 0.05, which means the water quality of the control pond and the treatment pond are no different. Algae Gracilaria verrucosa in pond treatment absorbs lead heavy metals (Pb). The test result of the ratio is the ratio of Pb A > the ratio of Pb B, which means the Pb in Algae comes from pond water.The presence of Gracilaria verrucosa algae in ponds does not contribute to improving the quality of pond water.