The Vancouver Aquarium uses water from Burrard Inlet that is pumped in. I believe that the water comes from 200m from shore and I forget the depth. They use primary treatment that is all underneath the exhibits to filter the water before use. It's used in all their displays except the coral tank which they use synthetic. The salinity of the water is a little low for the corals.
Walt Smith also uses NSW in his Fiji station. He gets his water 2 miles from shore and still filters with UV and RK2 skimmers.
The amount of work required with trying to collect and filter NSW seems to be more trouble than it's worth for the average hobbiest.
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