Thanks for the link. Interesting, but not fatal...
I know the Vancouver Aquarium "does it", but I'm looking for discussions, on the practicality/application and suppliers.
Here's a paper from Shimek I found on Reefkeeping.com on some fishes.
http://reefkeeping.com/issues/2002-11/rs/index.htm
Sounds like swimming space isn't that much of an issue, but feeding copious amounts is.
Mitch
(btw, 'cowtown" is Calgary)