The basic system has a simple design and consists of fish tanks, mechanical filter, biofilter, trickling filter or degasser, oxygen enrichment unit, UV disinfector, some extra facilities like the Ph regulator, heat unit exchange unit, denitrification unit can be added to the design depending on the requirements.
The basic operating principle of these systems is that the water from the fish tank moves through the mechanical filter and then through the biological filter; the water is stripped of carbon dioxide before getting aerated and is returned back to the fish tanks.
