NOVELTY - A product for treating a water body containing ammonia impurities or organic waste matter comprises a pre-colonized filter media contained in a prepackage. The pre-colonized filter media is pre-colonized with herotroph microorganisms to enhance the biological oxidation of organic matter or nitrifying microorganisms.    USE - For treating water body containing ammonia impurities or organic waste matter (claimed) e.g. pond or aquarium.    ADVANTAGE - The filter media when exposed to water containing organic matter, the microorganisms germinate, grow and form new microbial substances that aid in oxidation and elimination of toxic ammonia. The combined microorganisms absorb and break down ammonia and improve the performance of the media specific to a greater rate of nitrification via an increased, more effective nitrifying bio-film formation and an overall increase in the rate of ammonia removal. The pre-inoculated nitrifying media, such as filter pad increases the microbial functions provides rapid biological oxidation of ammonia within bio-filters and other related biological water clarification systems and equipment. The pre-colonized filter media is pre-packed in nylon media bags that can be placed into a master media bag or set directly into a pond that enhances the distribution of nitrified bacteria. The prepackaged bags easily fit into most biological filters, pressurized filters, filter falls, skimmers and skimmer baskets. The media sealed in the nylon bags minimizes the effects of a mess generated by loose pellets or chips. The product is easy to handle and easy to change. Pre-inoculation or pre-colonization of the filter media with the nitrifying bacteria significantly improves the speed of achieving nitrification by enhancing the nitrification process (i.e. under optimum conditions the development time for nitrifying bacteria is from 8-16 hours for cell division to occur), thus speeds ammonia removal by nitrification and improves organic filtration efficiency. Nitrification eliminates the toxic effects of ammonia by converting ammonia to nitrite (using Nitrosomanos), and converting nitrite to nitrate (by using Nitrobacter, and Nitrospira). Carbon pellets remove medications, odors and dyes. Carbon pellets and Zeolite chips provide double filtration. Herotroph microorganisms enhance the biological oxidation of organic matter. Zeolite chip removes ammonia while protecting against ammonia spikes. Zeolite removes dissolved organics, improves fish mortality rates, reduces fish stress and improves the water quality. The biological pin balls provide the highest surface area exposure for superior biological filtration, are excellent for oxygen and gas exchange, and when used in a loose state, fit most skimmers or filters. Bio-pin balls can be placed into master media bags or set directly into the ponds.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for treating the water body having impurities by a filter media contained in container involving pre-colonizing the filter media with a nitrifying microorganisms, sealing the container and placing the container in the water body having water flow in it; or pre-colonizing the filter media with herotroph microorganisms.