Intensified fish culture combining water reconditioning with pollution abatement

Diminishing sources of new pure water supplies, increasing demand for sport and commercial fishes, and developing governmental pollution abatement requirements in the U.S.A. led to a study by the authors' firm for a group of agencies. It was found that a properly designed water reconditioning-reuse system, under conditions set forth, can provide necessary pollution abatement and increase a hatchery's fish carrying capacity tenfold as compared to a single-pass system. Requirements for removal of ammonia, nitrite and solids are discussed.