I used chemiclean on my sps tank and I had no problems. I did have one staghorn acro lose some tissue around its base, but I was also working on getting my alkalinity right. After that was corrected, the polyps went from brown to dark green, but never regrew tissue (though the area where the tissue was absent was being shaded).
However, after saying this, I had a coworker use the stuff a week ago, and he lost two fish, his snails looked like they were going to die and all his corals closed up. He has predominantly LPS along with Xenia and zoanthids, plus some anemones. He did a few major water changes, and things are looking up.
I guess it is up to you. He used half dosage. I used normal dosage, and retreated a week later. Both of us turned off our skimmers and ran airstones, but my tank has no fish and is open top if that makes a difference. I read another post where Chemiclean is supposed to be an "oxidizer" instead of an antibiotic.
