For all the others that have commented on Walt Disney being very forgiving, that has been my experience as well. I had some massive alk swings due to equipment failure and WD never even died back. Pretty much all the other SPS I had went down during that time though. JF Fox Flame is an interesting one to me, I can't keep a frag of that alive for anything even now that most other SPS grow well in my tank. To me it reinforces what others have said there are a lot of variables from tank to tank that go into being successful.