I reimported Aiptasia back in my display a year back on a clam. Have not gotten rid of it , but for whatever reason it does not do well. I kill one a month only . Same stuff proliferates like crazy in my frag tank, go figure.
I know what that stuff is, If you run out send me a PM. I have tons in my quarantine and a little extra in my displays.
I bought a copper band two weeks ago, He died in quarantine in a week. I have a file fish in quarantine and I'm fattening up the Aiptasia for him when he's released.
You can't make this crap up....