They're pretty easy to keep and relatively fast growing if you stuff them with food regularly. They tolerate most lighting just not to much current or you get some sweepers. The prices on these are definately a bit out there (especially up here in the Seattle area). You can find them online alot cheaper (atlantisaquarium.net $20-30 a head, aquaticbliss.com $15-20 a head). I bought a one head frag about 4 months ago and it has 7 good size heads already.