Final fish densities (70 ± 3.5 kg m−3, p = 0.733), FCR(1.0 ± 0.09 g g−1, p = 0.809) and SGR (0.9 ± 0.07% d−1, p = 0.878)were even in all systems. Some mortality was observed in all systems, though not related to mesh size (p = 0.234). Fish biomass mortality in each tank occurred between 0 and 2% in the control treatment, 0 and 3% in the treatment group with 100 m filters, 0and 4% in the 60 m treatment, and 2 and 5% in the 20 m group