We're growing our smelts currently at about 50 kilograms per cubic metre, or 40 to 50, and that's to make the most efficient use of those hatchery facilities in recirculating aquaculture for our hatcheries. For the brood stock, it's not so much. We're growing those in recirculating facilities, but much lower densities, maybe 10 to 15 kilograms per cubic metre. The reason is that each fish has quite a high value, because it carries the eggs and milk for the next generation.
In our engineering proposal for the pilot that we're considering, in order to get the combination with the best chance of being economically viable, we have to operate at 80 to 90 kilograms per cubic metre for an extended time. That's higher than we're used to, though not as high as has been done by some test groups that have gone to maybe 100 kilograms. But we have to hold at 90 for most of the life of the salmon; plus we must have essentially zero mortality while we're doing it. So things have to go just right to get the best viability output.