Search on here for Bayer, or google bayer coral dip.
I would also start researching coral pests. I'm dealing with montipora eating nudibranchs and it's not fun. Once all my montis are gone, I'm guessing I'm going a year without any montipora. :(
Best to get that worked into your procedure for new frags.
You don't need to drip acclimate coral - IMO- I never have and we're good. Just looking to save you time that you could be using to inspect your new frag for unwanted hitchhikers/pests.
As others mentioned, check for coral warfare, those mushrooms will kill your sps if they get the chance.
If it was bleached, I would expect to see polyps, but clear. It looks like skeleton in the picture.
Any fish that are reef questionable?
alk is something you want to get a test kit for, that and Ca (Calcium). I know a very high end SPS blah blah more money than I can think of tank that uses the API Alk & Ca tests. Nothing else from API but specifically the Alk & Ca tests. Hopefully that can get you something that might be more cost-effective and get you in the habit of checking your alk/CA at a min.
Alk is something the changes and IME the first thing that leads to problems. Consistency is key with Alk and everything else for that matter.