you would have to be pretty naive to expect that DFO would or will say anything negative about the fish farm industry, after all they are mandated to assist the aqua industry.
as for closed containment: if proven that it is less likely to pollute or contaminate the ocean then that is what should be used and yes effluent should be treated to the standards set out for other industries.
as for additional costs? hey , that is the industry's problem, just as with any of the other industries they also have to foot the bill, if that makes the product too costly, C'est la vie.
We have for too long underpriced the value of our wild stock, The production of the farmed fish may well allow the fare to be affordable to more markets but all the pro's and con's have to be weighed up. it is not simply price per pound it is what is included in that price per pound that is important.
to simply deny that there is any negative effect to the environment is dishonest and ignorant, as is blaming the Aqua industry for the demise of the wild stocks, that is simply not true either. With that said, I still do not like the practices of the Aqua industry and somewhat their attitude towards the general public. I think, what is required, is a completely impartial and unbiased review published, when that is complete a public referendum held on whether this industry should remain on our coast. There is no reason that with technology today , we can't do this.
The Environmental agencies whether federal or provincial, should be unfettered by politics and only have one mandate, that is to look out for the environment, all reports and operations should be completely transparent.