The problem of this project: The raw water pollution is serious because there are a large number of heavy metals and harmful bacteria, and left some untreated and abandoned pond.
During the same period, the polluted fish ponds, some of them after treating by the ozone, the water quality return normal:
Ozone Equipment: OSUNSHINE 60G/H water cooling ozone machine + 12T/hr Gas Liquid Mixing Pump
After ozone treatment, prawns grow normally, and here is the size of 40 days prawn.