RandyO on RC
Lately, instead of cutting them up, I
glue them on new, larger rocks. Once they just about cover the top of a frag rock, they will start to grow down the sides of the rock, and even underneath the rock. So, what I have been doing is getting a larger frag rock that is just a few inches larger and glue the Acanthastrea rock on top of this larger rock. The Acanthastrea now continue to grow down this rock and start to cover it. When they encrust far enough, I will get an even bigger rock for another base. It's kind of like building a snowman. You take 3 balls of snow. Small on top, and largest on the bottom. And the Acanthastrea encrusts its way down the sides, giving you a larger looking mother colony since the center is all rock. And if someday, I don't want that big colony, I can pry the 3 rocks apart and have 3 smaller colonies.
I hope I didn't loose you guys. That was tough to explain.
First frag rock A
Second rock glued to the bottom AAA
Third rock glued to second rock AAAA
You end up with a large rounded colony.