The large centerpiece rock is a man-made rock. The piece surrounding and supporting it are all natural/real reef rock. As far as I know, the man-made rock is no longer being made, but we do still have quite a few pieces of it.
To expand on this, we are keeping a close eye on the little guy. I am a bit worried because I think that the HLLE is getting worse (but I might be imagining it). Will try to keep photographic evidence to monitor the situation.
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