Birds nest is a great coral...but personally, I'd avoid putting them in a nano. I'm not recalling the size of your tank, but in my 55 I have one that has just become overwhelming and a small frag of another than is going to do the same in a year's time. Great coral, but can easily become a weed...literally! I have fish breaking pieces off of the large colony by accident and these pieces starting to grow and encrust themselves where they land.