I have done a lot of research on the Pyramid. It is considered almost totally reef safe and one of the hardiest butterflys. Marine Fishes even gives it a 4 out of 5 for aquarium suitability (an unusually high score for a butterflyfish).

I am hoping that by having the solar wrasse established for a little while prior to adding the six-line things will work out. Brian seems to think that in a system my size it will be OK. I have thoroughly researched all of my additions and while some may be a little on the edge they all have a pretty good chance of success if I keep my end of the bargain (good water quality, proper feeding, etc.).