Killing flatworms in live rock

[Jayson]

Fill up a pail of fresh water get it to about the same temp as your tank water. Take your rock and shake it vigorously in the bucket of fresh water for about 20 seconds. You will see the flat worms fall off instantly. place the rock back in the tank right away. You should have minimal die off. Most of your corals will be fine if you do this quickly. The rock will have no adverse side effects. If you want to try a chemical remedy you can try to find a product called Marine oomed by Tetra. If you go the fish route your chances are hit and miss if the fish will actually eat them. Best of luck.