Thanks, I'll try and find an urchin. I'm sure I can find a new home for it once it's too big/done.
This rock definitely had some serious macro algae on it when I got. At first it was actually pretty enough that I didn't put corals in for the first several months, some really nice mixes of blue, red, and yellow macros that looked better than anything I could have tried to replicate. Then over the course of months this other nasty grey-green branching crap took over, it started as one compact mound that changed growth habits under my lights and now that's all that's left. It's only been in the past couple of months that it's gotten so crazy that it's outcompeting everything else. It will even anchor and start growing anywhere in a zoa colony that there is exposed rock. So frustrating.
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