Coral Magazine did a write up on lanthanum chloride being used. It's a way off label use, worked great for me, but do your own research and be careful. There is some good info in it on here going back to 2005 Anyway the active ingredient in Flatworm exit was cut into cocaine in the UK, and that's bad. You may be able to contact a veterinarian and get a script for Levamisole, which is that ingredient in Flatworm exit. Just be careful, run carbon, big water changes, and what ever you dose, do it more than once to get the eggs.