Looking for flatworm treatment ( Vancouver )

[Mr.nintendo]

Hundreds may be an over-statment haha, but there is lots

Parameters are all ok, some a little off but more so then anything I think it was the introduction of a few new rocks. I've increased water changes and food wise I've always been cautious, never over-feeding and only dropping a few pellets or shrimp at a time.

They aren't causing any issues yet, just lots visible and want them taken care of before they do. I'll just go buy flatwrom exit if I can find out where and it or the other option