Pencil Urchin help.
I have a bit of a problem. Can anyone help me with cleaning a pencil urchin. I had a small outbreak of green hair algae and I began removing it from my rock. I thought that I had removed all of it as I was scraping the rock but I must have missed some in the water because now my urchin is just a ball of green. Any ideas how I can get this off of it without killing it?
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