I have a Galaxea. I got mine as a small frag about three or four years ago and it is huge now. It grows fast with bright light and strong water flow. The stronger the flow the longer the sweeper tentacles. Definitely keep it away from other corals.
Better get ready with the scissors on those sweepers
"When they was no meat we ate fowl, when there was no fowl we ate crawdad. And when there was no crawdad to be found, we ate sand."--Cellmate
"You ate what?"--H.I.
"We ate sand."--Cellmate
"You ate sand?"--H.I.
"That's right."--Cellmate