systems, a good flow of water is essential to maintain good oxygen levels. In ponds,
water flow and aeration are both options that can be used to maintain oxygen at
acceptable levels (>5 mg/litre).
For cellular systems involving recirculation systems within buildings, for fattening,
soft-shell crab production or grow-out, the site requirements are quite different. Such
recirculation systems require access to good-quality marine and freshwater sources and
appropriate electricity supply, as the demands of such systems are significant.