This medication isn't reef safe. I tried it to eradicate white spot and while it's effective at eradicating the white spot, I lost a number of corals, snails and shrimp. All my zoas, turbo snail, nassarius snails and cleaner shrimp died. Super Sun coral and Hammer coral retracted and stayed that way for days until I did 3x 20% water changes and put carbon in the sump. Red mushrooms closed up and withered. Yuma mushrooms are still 50-50 after 1 week as they closed up but haven't died yet. Skimmer went crazy too and is still not fully back in action even after 3x 20% wc and carbon.
All in all, I wouldn't use it again.