6" is plenty enough, even 2" is fine. As lons as a coral does not touch it for a long period of time it will be fine.
I even have the remain of one that I detached from a rock to sell it and it is only encrusted for now but it is growing in between my zoanthids and digitata and does not seem to affect them.
Mine is a very nice light fluorescent green, very striking in color.
Quote:
Originally Posted by Titus99
Ok. It is 6 inches from anything else. I really do like the look and color. So I may try and see. It's at top of tank so I'm not worried about others falling on it. The closest would be a brain that's under it.
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