Not surprised to see a Hollywood stunner at that size, stuff grows like a weed

Yea that's big and those people are crazy using that dremel, they need a Chain saw! And who really wants a big hunk of that on there sandbed. I would prefer the photo I posted in my tank :P

Chalice will grow as large as you let them, Hollywood stunner being the largest pieces I have seen as yes it does grow quick and the others don't, some growing very very slow.

I have a Green chalice with Orange mouths that is about 18" across. My Chalice grows about 2" a year.

Cheers,
Tim

I've seen this chalice , its awesome!