Article posted: 7/29/2012 1:00 AM

Recycled aquarium water benefits goldfish and seedlings

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Hank Brinzer grows plants using a technique called aquaponics. Water from a fish tank is pumped up to a tray of plants to feed them. The water then slowly drains back into the tank.

Doug Oster / Pittsburgh Post-Gazette

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The relaxing sound of trickling water echoes through Hank Brinzer's attached greenhouse in the Pittsburgh suburb of Clinton. Underneath a bench filled with lush plants, goldfish unknowingly feed seedlings as the water splashes into their tank. It's hydroponics with a fishy component.