does pimafix hurt corals?

[fishforlife]

I have a bit of a fungus problem and I chose Pimafix because it is all natural and had good reviews. I placed teh dose in my tank and my xenias and evergreen polyps closed up immediatly. Will this treatmen hurt the corals? Also the directions said to turn off the skimmer while treating the fungus.

-----Addition-----

I read on a few other websites that this med causes corals to close initailly, then they will reopen. Sorry, got sacred for a minute and thought I killed all my corals. YIKES! So it looks like this is a good prduct and you need to turn off the skimmer or it will bubble up quite a bit.