I couldn't get ANY brand of biocide [specifically to kill algae], from local fuel / farm equipment dealers ... I'm in a small town of about 20,000 population ....
That particular brand I couldn't find in canada [just from using ebay and search engines], but I did find it in the US
10-4. Now I'm curious if the regs have changed on that class of product here...... at least we have internet options.
Rgds, D.