Hi All I did a major overall recently to my AIO 14 Gallon Nuvo Penninsula. Replaced Protein Skimmer, Return Pump and Powerhead. I also did a little reworking of the rock work and scrubbed some hair algae I've been battling (the flow through my overflow was not pushing the water through my Chemipure Blue, rather around it). None of my fish, corals or other inverts were affected by the change, however, I noticed today that my pincushion urchin was losing a bunch of its purple spins on the top of its body. It's still moving around and the purple spines on the bottom are mostly intact. Am I at the point of needing to remove it in order to avoid it causing a nitrate spike when it randomly kicks the bucket.