If the Echinophyllia is big enough, I don't mount them. If you are growing them out just to make frags, it's easier to cut a piece that's unmounted. If they are kept on the bottom of a bare bottom tank, they grow out nice and flat. I've cut some of my Echinophyllia with just a razor blade because they were nice and thin, and flat.
But I do agree, if it's a small frag, you should mount if. If it gets blown around, it could get damaged. The Watermelon Echino has a very thin skeleton, making it very lightweight. I haven't had the guts to let a small piece lay in my frag tank to grow out flat.
Here's a few old pic's that are probably somewhere in this thread already.
The large pink colonies were kept on the bottom, so they grew flat. But room was in short supply, so the green colony was angled against the rocks. You can see how the bottom conformed flat to the glass. When you put these guys on the rocks, they usually take the form of the rock, conforming over it, or even attaching themselves to the rock. That makes fragging them a little harder.
Thin colonies are pretty easy to cut.
Here is that green colony in 2003, being cut with a razor blade.
A picture from December 2005 of flat colonies, and frags.
The frags will grow out flat and round, if left on the bottom.
This method has worked well for me, but when it came to the watermelon, I left it on the rock.
And it grew over the whole rock, and then wanted to go under it.
So I had to frag it with the tile saw. That was not very fun to hold a piece the size of a golf ball with no rock to grab onto. I had to press on the flesh, which is not very good for the coral.
Though the last time I fragged this guy, I did what Slojmn said, and started popping it off the mount. That worked pretty good too.
Slojmn,
Acanthastrea are not chalice corals.
