Collapsible Canvas Fish Tanks

'Urban Aquaculture'

Schreibman's lab on the campus of Brooklyn College in New York is full of pipes and pumps whirring and clanking.

You're hit by a fishy smell when you walk in, and you quickly see why: Jacuzzi-sized tanks, filled with tilapia.

"These guys haven't been fed today, so you can see how voracious they are," Schreibman says, tossing food pellets in the water.

His tanks are part of a system very different from a fish farm or natural ecosystem. Schreibman's worked for years to develop an advanced water-recirculation system that eliminates the need for chemicals during the growth process. It filters plain old tap water in and out of a tank, constantly circulating and removing fish waste.

Over the course of years of work, Schreibman says, "it just occurred to me and my colleagues that we can grow a lot of fish in a very small area, on land, under controlled conditions. And there are no antibiotics, pesticides or hormones."

Schreibman works primarily with tilapia, which are resilient and good for research. But he says he can tweak temperature, salinity and other factors to grow most any kind of widely consumed fish — and grow them using only about a gallon of water per fish.

Schreibman calls this method urban aquaculture. And he thinks it could catch on as people grow increasingly concerned about where their food comes from and whether it's sustainably produced.

"This is the future," he says.

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