Raising ocean fish in land-based tanks on a commercial scale is usually uneconomical – while coastal aquariums can simply pump seawater into their tanks, this negates some of the advantages of being land-based for a commercial operation, such as eliminating parasites and water-borne diseases, and keeping fish wastes out of the environment.
If seawater is not used, then salt must be added to freshwater with care to pH levels and temperature. When the price of the fish is quite high—as for pufferfish in Japan—the numbers may work out. But the amount of water consumed and discharged can be very high.
Land-based aquaculture gets a boost from denitrification technology (SeafoodSource.com)
May 3, 2018
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