no mater how well I know the person.
I use melafix in a black vessel. I'm not trying to kill, I want to see what comes off. I will toss a $500 frag before I take a risk.
years ago I had a very close friend, very top reefer ask me to try and color up a colony of his that wasn't doing well. It had been a long day and I was tired and almost just pop n dropped but I did my dip and found dozens of AFEWs and eggs he ended up spending months getting them out of his small tank.
I fragged it and FW dipped, managed to save some of it.