IME,Blastomussa wellsi and B.merletti are very hardy.Obviously,with the growth form of B.wellsi,fragging isn't as easy as B.merletti.I agree totally,low light,acclimation,and feeding will keep these corals thriving in a reeftank.B.wellsi is reported to be a slow grower,I only have experience with the colony i bought 1.5yrs ago.It grew form 9 polyps to 24 last time i counted(last month).Its definately not what i'd call a fast grower but nearly tripling in size in 1.5yrs isn't bad IMO.