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I took my rocks out and scrubbed the hell out of them with a metal brush and they came back very fast and much worse! I read to do that too so I dont get it!Yea I’m almost to the point of just scrubbing the crap out of all my rocks
How does he get the corals on his back? I am thinking of trying one but dont want him pulling of my corals! So many arent mounting but on frag pasts and many mushroom attached to tiny rocks on sand bed! Expensive one too!Following up on this thread years later, but here is one more data point: I just saw my blue Tuxedo urchin munching down on bubble algae. He was walking on the glass after picking up some bubbles from the sand, so I had a clear view of him inserting the bubbles into his mouth one by one.
He also scoots around the tank with a bunch of soft corals on his back (not frags/plugs, but the actual corals), but that's a different story. Tons of personality in this invert!
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His spines are actually flexible. He uses them to grab things, including shells and frags, and moves them up onto his back. It’s fun to watch, but maybe not so much fun for the corals and other critters he grabs.How does he get the corals on his back?

