FLORIDA - Davie would lease 12 obsolete sewage treatment tanks to Nova Southeastern University to raise fish and sell them for a profit, which the town would share. The disinfected tanks would house tilapia and serve as an in-house laboratory for aquaculture research. For seven years, NSU fought a wave of challenges before finally hanging up its net about a year ago. Now, the school is contemplating the next step for its aquaculture research center. "We had great hopes, but market conditions have changed," said Richard Hodge, dean at NSU's Oceanographic Center. "It was successful in terms of our educational goal. But we brought in less than what we hoped for to support research activity."