Aquaponics (AP) is one of the newest integrated sustainable food production systems (especially in Nigeria).  It is a system in which aquatic animals can be reared and integrated with organically grow plants for food consumption.  In this study, wastewater generated in the aquaculture component is passed into the hydroponics component to grow some plants without soil being employed in the system.  The system was constructed at National Water Resources Institute (NWRI) workshop using locally available materials.  Lettuce and mints plants were used as natural bio-filter to treat the wastewater from the aquaculture component after which the treated water was returned into the aquaculture section for the development of the aquatic animals (fish).  Samples of wastewater from the aquaculture and the treated water from hydroponics components were taken and analyzed at the NWRI water quality laboratory.  Phosphate in wastewater ranges from 5.2 – 8.2 mg/l, while the in the treated water it ranges from 3.1 – 5.5 mg/l; Nitrate in wastewater ranges from 3.8 – 9.4 mg/l and in the treated it ranges from 2.5 – 6.8 mg/l; chloride in wastewater ranges from 13.25 – 43.25 mg/l and that of the treated water ranges from 12.22 – 34.24 mg/l.  The results showed that the system had performed effectively in the removal of contaminants from the water used in the aquaculture component of the system when compared with the desirable water quality for fish ponds.  It has also shown that the plants i.e. lettuce and mints used, were good absorber of contaminants from the wastewater.