On Wed, 16 Aug 2000, Dr. William Silvert wrote:

> The density of fish in a farm pen is much greater than in the average
> aquarium, and I hope that someone will comment on the relevance of greater
> oxygen demand, effluent production, and related topics to this suggestion.
> As I understand it, the value of open sea farming is in large part due to
> the flushing, which is not present in a concrete pen.
> 
> Bill Silvert

Do you think an aquarium could be aerated and flushed as much as a farm
pen? The aquarium would be located on a shoreline or perhaps an inlet
could be sectioned off into a number of aquaria by concrete barriers.
FWP

> ----- Original Message -----
> From: Franklin Wayne Poley <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Terça-feira, 15 de Agosto de 2000 23:02
> Subject: Re: FF: Massive Ocean Aquaculture Cages
> 
> 
> These are huge yields and must be hugely profitable. A cage of 100,000
> cubic meters is about 70 x 70 x 20. That's pretty small compared to the
> Burrard Inlet for example (which is only a block from me). What would it
> cost to build a concrete wall 70 metres into the inlet which would be 70
> metres across and 20 metres deep? I have a couple of scuba licenses and
> dry suit and I can dive to 20 metres with ease so that's a good depth.
> This is then a big aquarium. Next, how about one of more ponds into which
> the effluent could be pumped? Can the water then be tested in a
> cost-effective way before release?  Lots of contractors can tell you how
> much it would cost to build these big fish tanks. Vancouver Aquarium can
> tell you about managing large aquariums.
> 
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