My recent posts on breakthrough efforts in Bluefin Tuna reproduction by Clean Seas Tuna clearly illustrates how important it can be to control the environmental conditions experienced by a captive fish population.
One of the key contributors to fine grained control applied by Clean Seas is UNI-Aqua a Danish designer, systems integrator and builder of recirculating systems for rearing broodstock and aquaculture growout.
UNI-Aqua have established quite a reputation for themselves as a result of projects with an array of salt and freshwater species in Europe, South America, North America, Australia and Asia.
A nice review of the Arno Bay recirculating facility in South Australia can be viewed here.