Flatworm exit and inverts

[Casshern]

I suspect i have flatworms in my sps tank. I've done the treatments before but the last tank was all SPS and a few fish. In this tank, I do have a few xenia and 2 seahares. I was wondering if anyone had experience with fwe and delicate inverts/softies. I plan on doing 3-4 treatments one week apart from each other; 2x,3x,4x,4x respectively


thanks in advance