I agree with Rye, colt is one of the easiest. I started with one the size of a softball and now it is almost as tall as my tank. They are somewhat agressive though so put them by themselves and allow them room to grow. I think another good choice is a leather. They seem to be very hardy and quite beautiful.
Rye, how do i frag
my colt without killing it. I am very new to saltwater myself and have never fragged before. If it is not something I should do then maybe I should think about trading it in 'cause it will soon be to large for the area it is in in my tank.