Flatworm Exit in Canada?

[MKLKT]

I had a few flatworms left over from my softie tank that I noticed in my new tank. I never saw them in my display before but there was a colony in the sump. They were the reddish brown ones. I only saw 10-20 in my new tank so I decided to dose Flatworm Exit that I had bought before but didn't use.

I admit that I was laughing maniacally as they ran for the hills and met their doom. It was like some macabre dance. Haven't seen any since!