Mr. Donal Maguire:

Sea water is a really difficult medium in which to work. It is highly corrosive and it reacts very badly, as does the equipment, if one is obliged to heat it and one must control the temperature in these issues; the water chemistry is completely different. The technology pertaining to recirculation technology in fresh water is largely driven by the Danes, who are really good at this when it comes to trout farming. They have taken this to a fantastic level where it really is very reliable and the systems all work. As for trying to do it with sea water, it has not yet proven feasible to do it at an economic level, although there have been some very big ambitious projects. A number of projects are trying it at present but as yet, the jury is out. Thus far, all who have tried it have been obliged to stop, redesign, and rebuild and none of then have proved to be sustainable from a technical or an economic point of view. I am sure they will be; it just has not got there yet.