Assessment of the quality of pond sediment in aquaculture using simple,rapid techniques

Aquaculture ponds receive inputs of organic matter such as uneaten feed, fertilizer and faeces. Analytical methods for four parameters are described to assess the sediment quality. These parameters are redox potential, pH, the hydrogen sulphide activity potential (pH₂S) and soluble ammonium nitrogen. The techniques are simple, rapid, and are practical on site. Ranges encountered are given and safe ranges suggested.