Biological Filter

How do we recirculate the wastewater without making it toxic to fish? Ammonia is a compound found in fish waste; in high enough amounts it can be toxic to fish. To solve this issue, we use a biological filter. This filter includes mutli surface beads, starter bacteria, and a container for this process to take place in. The biological function lives within the nitrogen cycle in a process called nitrification. In nitrification, ammonia from the fish wastewater is oxidized to nitrites and then nitrates by a nitrifying bacterium. After this process the water is once again safe for fish to swim in and the nitrates are absorbed by the plants in the grow bed.