Dr. Tim's Waste Away availablilty?

[stellarfly]

Looking to find a place that sells Dr. Tim's waste away. Does canada sell this stuff? I tried a few online retailers like amazon.com but they state no shipping to canada. Why? is it something to do with importing of fish stuff and regulations? I do realize that Dr. Tim's aquatics does international shipping but its too expensive. need a cheaper solution.

What about prodibio bio digest? is this the next best bacteria dosing option for me?

let me know.