Zoos grow pretty fast too. Here is our colony. We have had them about a year and the frag was just tiny when we got it. Be patient and keepyour water quality good.
Darn they look good. If you want to control your Zoos colony and keep it from spreading throughout your tank, send me some of the overgrowth...lol What lighting do you have? You must be set up perfectly for it to grow that fast... I love those pics
All kinds of green Calupera grows fast and is great to keep nitrates under control. I have to pull handfuls out of my refugium every month to keep it at bay.
Also, my paranorca (similar to anchor coral) grows pretty fast (not like to GSPs!), I got it with two branches, and a year later is has 9 branches...and my torch has nearly doubled in size since I got it about 6 months ago.