Ive found that certain smooth skin corals like Red dragon, hawkins and ice fire are more difficult than others.Certain Torts can be finicky too. All the other millis, stags, tenius, yongei etc...are generally more accepting of slight swings in chemistry or water quality. Once you achieve a stable environment then most Acros are the same difficulty. Now lighting/flow are different story.
The guy at LFS told me that its better to dose calcium, mag, strontium etc.
That's kinda the reason I was asking, what acros did you guys start with first?