Burrows pond retro-fit

摘要

For many years concrete Burrows ponds have been used as a standard raceway system for rearing trout and salmon juveniles across North America. They are an efficient use of space and can rely on gravity-flow, but compared to a circular tank design, Burrows ponds (BP) often do not provide enough flow to remove waste feed and feces from the tank. Indeed, you won't find Burrows ponds in new hatchery designs and many facilities have converted their older ponds to raceways.