http://www.webofcreation.org/BuildingGrounds/aqua/Chap3.html
[Accessed: 04.08.2011]
This webpage is about aquaponics. Aquaponics is the combination of aquaculture and hydroponics. While algae, submerged plants, and floating plants do a good job of removing fish wastes from a recirculating aquaculture system, so can lettuce, basil, or many other common vegetables and herbs. Fish wastes can be treated with a biofilter and then allowed to pass through hydroponic troughs, where the roots of cultivated plants can remove the wastes as fertiliser.