There are several factors limiting the operation of fish farm in different parts of the country. The most common is air pollution in terms of odour that emanates from the fish farm. This is why most fish ponds are located in rural or less-populated area where the odour has less environmental effect and it is bearable in the neighborhood. A fish farmer must find effective ways to control odour in fish ponds. This is a contingent measure to ensure the continuity of the business as population grows. An urban society used to be a rural society. A smell of rotten eggs in fish ponds is caused by a combination of carbon dioxide and hydrogen sulphide, which are the waste products of anaerobic bacteria which work in low oxygen conditions. A heavy, swampy smell is typically noticed during and after a heavy algae bloom, where new algae are growing and old algae decomposing at a rapid pace. There are a few common causes of pond odours, and all should be taken seriously and treated if you