Pottsy,
I spread the Bentonite over the service via shovel yesterday and it has already for the most part settled to the bottom. However the bentonite is so light (light blue in color) that the bottom of the holding pond looks like a swimming pool now. I hope it works. If not I tried.
This bentonite came from a company in Iowa. That's not as far from Canada as Texas, so maybe there are sources closer to you.